brain teasers

It's fun to solve brain teasers and I've heard your brain is like a muscle. If you exercise it (by teasing it) you'll have a fit brain. Even if that's not true, I still like to solve them. If you know some good brain teasers, please send them to me. It can also be useful to know how to solve these for job interviews. For some reason interviewers think if you know how to solve puzzles and can think quickly you'll be an ideal employee. Have fun :)

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1. By moving one of the following digits, make the equation correct. 62 - 63 = 1

2. You have a fox, a chicken and a sack of grain. You must cross a river with only one of them at a time. If you leave the fox with the chicken he will eat it; if you leave the chicken with the grain he will eat it. How can you get all three across safely?

3. You have 12 black socks and 12 white socks mixed up in a drawer. You're up very early and it's too dark to tell them apart. What's the smallest number of socks you need to take out (blindly) to be sure of having a matching pair?

4. What is special about the following sequence of numbers?
8 5 4 9 1 7 6 10 3 2 0

5. Three travelers register at a hotel and are told that their rooms will cost \$10 each so they pay \$30. Later the clerk realizes that he made a mistake and should have only charged them \$25. He gives a bellboy \$5 to return to them but the bellboy is dishonest and gives them each only \$1, keeping \$2 for himself. So the men actually spent \$27 and the bellboy kept \$2. What happened to the other dollar of the original \$30?

6. You are the bus driver. At your first stop, you pick up 29 people. On your second stop, 18 of those 29 people get off, and at the same time 10 new passengers arrive. At your next stop, 3 of those 10 passengers get off, and 13 new passengers come on. On your fourth stop 4 of the remaining 10 passengers get off, 6 of those new 13 passengers get off as well, then 17 new passengers get on. What is the color of the bus driver's eyes?

7. A rooster lays an egg at the very top of a slanted roof. Which side is the egg going to roll off on?

8. U2 has a concert that starts in 17 minutes and they must all cross a bridge to get there. All four men begin on the same side of the bridge. You must help them across to the other side. It is night. There is one flashlight. A maximum of two people can cross at one time. Any party who crosses, either 1 or 2 people, must have the flashlight with them.

The flashlight must be walked back and forth. It cannot be thrown and other tricks like that are not needed to solve the problem. The solution is simply a matter of allocating resources in a certain order. Each band member walks at a different speed. A pair must walk together at the rate of the slower man's pace:

Bono: 1 minute to cross
Edge: 2 minutes to cross
Adam: 5 minutes to cross
Larry: 10 minutes to cross

For example: if Bono and Larry walk across first, 10 minutes have elapsed when they get to the other side of the bridge. If Larry then returns with the flashlight, a total of 20 minutes have passed and you have failed the mission.

9. Why is it very common to have a 9 minute snooze interval on alarm clocks, why not 10 instead?

10. A bookworm eats from the first page of an encyclopedia to the last page in a straight line. The encyclopedia consists of ten 1000-page volumes and is sitting on a bookshelf in the usual order. Not counting covers, title pages, etc., how many pages does the bookworm eat through?

11. An Arab sheikh tells his two sons to race their camels to a distant city to see who will inherit his fortune. The one whose camel is slower will win. The brothers, after wandering aimlessly for days, ask a wise man for advise. After hearing the advice they jump on the camels and race as fast as they can to the city. What does the wise man say?

12. An 18-wheeler is crossing a 4 kilometer bridge that can only support 10,000 kilograms and that's exactly how much the rig weighs. Halfway across the bridge a 30 gram sparrow lands on the cab, but the bridge doesn't collapse. Why not?

13. A completely black dog was strolling down Main street during a total blackout affecting the entire town. Not a single streetlight had been on for hours. As the dog crosses the center of the road a Buick Skylark with 2 broken headlights speeds towards it, but manages to swerve out of the way just in time. How could the driver see the dog to swerve in time?

14. In a small cabin in the woods, two men lay dead. The cabin itself is not burned, but the forest all around is burned to cinders. How did the men die?

15. Ida puts her coffee into the microwave, as she does every morning, for exactly 2 minutes. When the microwave goes off, she opens the door, but then closes the door again and sets the microwave for 2 more seconds. What good would 2 more seconds be?

16. Beulah died in the Appalachians while Craig died at sea. Everyone was much happier with Craig's death. Why?

17. You are a cook in a remote area with no clocks or other way of keeping time other than a four-minute and a seven-minute hourglass. On the stove is a pot of boiling water. Jill asks you to cook a nine-minute egg in exactly 9 minutes, and you know she is a perfectionist and can tell if you undercook or overcook the egg by even a few seconds. How can you cook the egg for exactly 9 minutes?

18. I am the owner of a pet store. If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

19. Here is a series of numbers. What is the next number in the sequence?
1
11
21
1211
111221
312211
13112221

20. My daughter has as many sisters as she has brothers. Each of her brothers has twice as many sisters as brothers. How many sons and daughters do I have?

21. What seven-letter word has hundreds of letters in it?

22. If you had a ton of feathers and a ton of stones which would be heavier?

23. Tom's mother has three children. One is named April, one is named May. What is the third one named?

24. Two women apply for a job. They are identical and have the same mother, father and birthday. The interviewer asks, "Are you twins?" to which they honestly reply, "No".

How is this possible?

25. You are standing outside a closed door. On the other side of the door is a room that has three light bulbs in it. The room is completely sealed off from the outside. It has no windows and nothing can get in or out except through the door. On the outside of the room there are three light switches that control each of the respective light bulbs on the other side of the door.

Your assignment is to determine which light switch controls which light bulb. You are allowed to enter the room only once, and once you come out, you must be able to state with 100% certainty which light switch controls which light bulb.

26. If a bottle and a cork cost a dollar and a nickel, and the bottle costs a dollar more than the cork, how much does the cork cost?

27. A boat has a ladder that has six rungs. Each rung is one foot apart. The bottom rung is one foot from the water. The tide rises at 12 inches every 15 minutes. High tide peaks in one hour.

When the tide is at its highest, how many rungs are under water?

28. You have a lighter and two fuses that take exactly one hour to burn, but they don't burn at a steady rate. For example, one fuse could take 59 minutes to burn the first inch and then burn the rest of the fuse in the last minute.

How would you use these two fuses to measure 45 minutes?

29. You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

30. A princess is as old as the prince will be when the princess is twice the age that the prince was when the princess's age was half the sum of their present ages.

What are their ages?

31. During WWII, there was a bridge connecting Germany and Switzerland, and on the German side, there was a sentry tower with a guard in it. He would come out every three minutes to check on the bridge, and he had orders to turn back anyone who tried to get into Germany, and shoot anyone trying to escape without a pass. There was a woman who desperately needed to get into Switzerland, and she knew she didn't have time to get a pass. It would take her at least six minutes to cross the bridge, but she managed to do it. How?

32. A man can make perfect counterfeit bills. They look exactly like real ones, they're made of exactly the same materials, made the same way, everything. So perfect, one could pretty much call them real bills. One day he successfully makes a perfect copy of another bill. However, he gets caught when he tries to use the copy. How is this possible?

33. A prisoner is told "If you tell a lie we will hang you; if you tell the truth we will shoot you." What can he say to save himself?

34. How many people can read hex if only you and dead people can read hex?

35. A man is traveling with a fox and two chickens, if he leaves the fox alone with the chickens the fox will eat the chickens. He comes to a river and needs to cross it, he finds a small boat that can carry only him and one animal, how does he get himself, the fox and two chickens across the river safely?

36. A man is looking at a picture of a man on the wall and states: Brothers and sisters I have none, but this man's father is my father's son. Who is the man in the picture in relation to the man looking at the picture?

37. A man and his son had a terrible car accident and were rushed to the hospital. The man died on the way, but the son was still barely alive. When they arrived, an old gray surgeon was called in to operate. Upon seeing the young boy, the surgeon said, "I can't operate - this is my son."
How is this possible?

38. A wise king devised a contest to see who would receive the Princess' hand in marriage. The Princess was put in a 50 x 50 foot carpeted room. Each of her four suitors were put in one corner of the room with a small box to stand on. The first one to touch the Princess' hand would be the winner and become the new King.

The rules were the contestants could not walk over the carpet, cross the plane of the carpet, or hang from anything; nor could they use anything but their body and wits (i.e. no magic, telepathy, nor any items such as ladders, block and tackles etc). One suitor figured out a way and married the Princess and became the new King. What did he do?

39. Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

40. You're riding a horse. To the right of you is a cliff and in front of you is an elephant moving at the same pace and you can't overtake it. To the left of you is a hippo running at the same speed and a lion is chasing you. How do you get to safety?

41. You have 50 quarters on the table in front of you. You are blindfolded and cannot discern whether a coin is heads up or tails up by feeling it. You are told that x coins are heads up, where 0 < x < 50. You are asked to separate the coins into two piles in such a way that the number of heads up coins in both piles is the same at the end. You may flip any coin over as many times as you want. How will you do it?

42. You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

43. Walking down the street one day, I met a woman strolling with her daughter. "What a lovely child," I remarked. "In fact, I have two children," she replied. What is the probability that both of her children are girls?

44. Three closed boxes have either white marbles, black marbles or both, and they are labeled white, black and both. However, you're told that each of the labels are wrong. You may reach into one of the boxes and pull out only one marble. Which box should you remove a marble from to determine the contents of all three boxes?

45. A glass of water with a single ice cube sits on a table. When the ice has completely melted, will the level of the water have increased, decreased or remain unchanged?

46. You are given eight coins and told that one of them is counterfeit. The counterfeit one is slightly heavier than the other seven. Otherwise, the coins look identical. Using a simple balance scale, how can you determine which coin is counterfeit using the scale only twice?

47. I was visiting a friend one evening and remembered that he had three daughters. I asked him how old they were. "The product of their ages is 72," he answered. Quizzically, I asked, "Is there anything else you can tell me?" "Yes," he replied, "the sum of their ages is equal to the number of my house." I stepped outside to see what the house number was. Upon returning inside, I said to my host, "I'm sorry, but I still can't figure out their ages." He responded apologetically, "I'm sorry, I forgot to mention that my oldest daughter likes strawberry shortcake." With this information, I was able to determine all three of their ages. How old is each daughter?

48. You're in a room with two doors. There's a guard at each door. One door is the exit, but behind the other door is something that will kill you. You're told that one guard always tells the truth and the other guard always lies. You don't know which guard is which. You are allowed to ask one question to either of the guards to determine which door is the exit. What question should you ask?

49. How far can a dog run into the forest?

50. What number comes next?
2, 2, 4, 12, 48, ___

51. You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles and 2 empty bowls and instructs you to divide the 100 marbles into the two bowls. You can divide them however you want as long as all the marbles are in the bowls. You will be blindfolded and the bowls and marbles will be throughly mixed. You will then choose a single marble from one of the bowls. If the marble is white, you live. Black and you will be put to death.

How do you divide the marbles up so that you have the greatest probability of choosing a white marble?

52. What is the next number in this series?
1, 2, 6, 42, 1806?

53. If:
2 3 = 10
7 2 = 63
6 5 = 66
8 4 = 96
9 7 = ??

54. What do the following numerals represent?
11111121113122223222

55. You must buy 100 chickens for exactly \$100, and purchase at least one chicken from each store. The first store charges 5 cents/chicken, the second charges \$1/chicken and the third charges \$5/chicken. How many chickens should you buy from each store?

56. What is special about the following number sequence?
8, 5, 4, 9, 1, 7, 6, 10, 3, 2, 0

57. Which two numbers are missing and where do they go in the sequence?
8, 11, 5, 14, 1, 7, 6, 10, 13, 3, 12, 2

58. What 4-digit number abcd satisfies this equation?
4 * abcd = dcba

59. Bill buys three items at the store for exactly \$100. The second item costs half as much as the first item, and the third item is half as much as the second. How much did each one cost?

60. A man was killed on Sunday morning. His wife found the body and called the police. The police arrived and questioned the chef, maid, butler, and gardener. Their alibis were:
Chef - making breakfast
Maid - getting mail
Butler - setting table
Gardener - watering plants
The police immediately arrested the criminal. Who was it and how did they know?

61. This is an unusual paragraph. I'm curious as to just how quickly you can find out what is so unusual about it. It looks so ordinary and plain that you would think nothing was wrong with it. In fact, nothing is wrong with it! It is highly unusual though. Study it and think about it, but you still may not find anything odd. But if you work at it a bit, you might find out. Try to do so without any coaching.

62. A murderer is condemned to death. He has to choose between three rooms. The first is full of raging fires, the second is full of assassins with loaded guns, and the third is full of lions that haven't eaten in 3 years. Which room is safest for him?

63. Name three consecutive days without using the words Wednesday, Friday, or Sunday.

64. A plane crashed on the border or US and Canada. Where do they bury the survivors?

65. There are six glasses in a row. The first three are full of water, and the next three are empty. By moving only one glass how can you make them alternate between full and empty?

66. What four weights can be used to balance from 1 to 30 pounds?

67. Given these equations, what is the answer to the last one?
5 3 2 = 151012
9 2 4 = 183662
8 6 3 = 482466
5 4 5 = 202504
7 2 5 = ?

68. Three numbers, 16, 14 and 38, need to be assigned to one of the rows of numbers below. Where do the numbers belong? (Hint: This is not a mathematical problem. The numerical values are irrelevant)

 A 0 6 8 9 3 B 15 27 21 10 19 C 7 1 47 11 17

69. 44 33 555 555 666 9 666 777 555 3
What is the message in this code?

70. Two men are standing on one side of a bridge and two women are approaching them. One of the men says, "Here comes my wife and daughter" to which the second man replies, "Here comes my wife and daughter". If they have not married the same woman and the women aren't pregnant, how is this true?

71. Rearrange the letters in the words "new door" to make one word.

72. Two fathers and two sons go fishing together in the same boat. They all catch a fish but the total catch for the day is 3 fish. How is this possible?

73. A green glass door admits only certain objects. Apples and balls are allowed, but pears and bats aren't. What determines whether an item can enter?

74. B,C,D,E,G,P
What is the next letter in the sequence?

75. A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

76. Stands
-----------
0_2345

What does this represent?

77. First, think of the color of clouds. Next think of the color of snow. Last, think of the color of the moon. Now, what do cows drink?

78. Rhonda will go see ballet but not the opera. Her favorite number is eight and she doesn't like nine. She likes salmon but not trout. She hates Mondays and likes Wednesdays. Does she use a comb or a brush?

79. On a regular 12-hour digital clock how many times would the same three digits in a row be displayed (e.g. 1:11, 11:12, 12:22) in one day?

80. A man says his dog can jump over his house. No one believes him but he is right. How is that possible?

81. Five pigeons are sitting on a fence. The farmer comes out and shoots one. How many are left?

82. A plane with 50 passengers crashes and everyone is killed, but there were only 49 bodies. How is this possible?

83. A man leaves home, turns left, goes straight, turns left again, goes straight and turns left once more then returns home and there's another man with a mask on. What's going on?

84. A man is leaving on a business trip and stops by his office on the way to the airport. The night watchman stops him and says, "Sir, don't take that flight. I had a dream last night that your plane would crash and everyone would die!" The business man cancels his trip and sure enough, the plane crashes, killing all the passengers. The man gives his watchman a \$10,000 reward for saving his life, then fires him. Why?

85. If you were to spell out the numbers, how far would you have to go before encountering the letter 'A'?

86. A sharpshooter hangs up his hat, turns around and walks 50 meters, then turns around and shoots his gun, putting a hole right through his hat. How did he do it?

87. 5 cats can catch 5 mice in 5 minutes. How many cats does it take to catch 100 mice in 100 minutes?

88. You are in a room with no windows, doors or any exit. The only items are a mirror and a table. How do you escape? (Not a typical brain teaser)

89. There's a green ranch house on a green street with green walls, tables and chairs. What color is the staircase?

90. A man saw a snake crossing the road and swerved to crush it with his tires. All the street lights were off as well as the car's headlights. There were no other lights on along the road. How did the man see the snake?

91. Four cards are placed in front of you on the table, each with a number on one side and a color on the other. The visible cards show 3, 8, red and brown. Which cards should you turn over in order to test the truth of the statement that if a card shows an even number on one face, then its opposite face is red?

 3 8 Red Brown

92. What do the following words have in common?
current, by, dew, faze, loan, ate

93. How can you alter the following equation by a single stroke to make it correct?
5 + 5 + 5 = 550

94. During lunch hour a group of boys from Mr. Bryant's homeroom visited a nearby grocery store. One of the five took an apple.

Jim said, "It was Hank or Tom".
Hank said, "Neither Eddie nor I did it."
Tom said, "Both of you are lying."
Don said, "No, one of them is lying, the other is speaking the truth."
Eddie said, "No, Don, that is not true."
When Mr. Bryant was consulted, he said, "Three of these boys are always truthful but two will lie every time."
Who took the apple?

95. A six-digit number represented by ABCDEF (each letter represents a different number) can be multiplied by 2, 3, 4, 5, and 6 and yet no new digits appear in the result. As a matter of fact, all the digits are rotated. What is the number?

96. What do these represent?

26 = LotA
7 = DotW
9 = LoaC
12 = SotZ
88 = PK

97. How do you pronounce Ghoti?

98. What does this sentence represent?

```Stand   Take  Mine  Taking
I     You    To     My```

99. What is the only anagram of Springiest?

100. How do you get from cold to warm in four steps, changing only one letter at a time?

101. How do you turn 2 into 5?

102. What is N?
6, 9, 27, 54, N, 2241

103. Two boys weighing 50 pounds each and their older brother weighing 100 pounds wish to cross a river. Their boat will only hold 100 pounds. How can they all cross the river in the boat?

104. A circular island with a diameter of 30 feet has a 30 foot tree stands at the center. A man cuts the tree down with his chainsaw, making the cut a foot up from the ground. The tree comes crashing down and hits the water but doesn't splash. Why not?

105. What word or expression does this represent?
ABCDEFGHIJKLMNOPQRSTVWXYZ

106. Jack is looking at Anne, but Anne is looking at George. Jack is married, but George is not. Is a married person looking at an unmarried person?
A) Yes
B) No
C) Cannot be determined

107. What is the missing number?
2 3 4 15 12
3 4 5 28 20
4 5 6 45 30
5 6 7 66 42
6 7 8 ?? 56

108. Two scruffy dogs were walking down the street. The first dog turned to the other and said, "Do you realize that if one of your fleas jumped onto me we would have the same number of fleas?" The second replied, "Yes, but if one of your fleas jumped onto me I would have five times as many fleas as you." How many fleas are on each dog to begin with?

109. A snail creeps 10 feet up a wall during the daytime, then falls asleep. It wakes up the next morning and discovers it slipped down 6 feet. If this happens each day, how many days will it take to reach the top of a 22 foot wall?

110. Two children were playing checkers and each played five games. Both children won the same number of games yet there were no ties. How is this possible?

111. How can you put 21 pigs in 4 pigpens and still have an odd number of pigs in each pen?

112. A woman gave a man a list of things she needed to buy at the store. The man gave the list back to the woman and she turned red with embarrassment. Why?

113. Mike, Jimmy, Nader, Kevin, and Larry were the top five finishers in the regional 500-mile race. They drove yellow, orange, green, red and blue cars but not necessarily in that order. Neither Kevin nor Larry drove the green car. Kevin finished faster than Mike and Larry. The blue car finished earlier than Larry's and Nader's car. The yellow car finished faster than the green car and the orange car. Mike's and Larry's car finished ahead of the orange car. Jimmy's car finished before the blue and the yellow car. Who drove what color car and what place did each driver finish?

114. While driving his car a man slams on the brakes when he sees, in the middle of the street, a diamond studded door, a gold door and a silver door. Which door does he open first?

115. Ronald has a rare opportunity to meet the President of the United States. During his visit the president gives him a gift but tells Ronald he is never to sell it unless he sees the president again. Ronald consents, but the president dies later that year. Years later a man offers to buy the President's gift for \$1000. Ronald agrees and exchanges the gift for 20 crisp \$50 bills. Did he keep his promise?

116. What 3 digit number has a tens digit that is 5 more than the ones digit and a hundreds digit that is 8 less than the tens digit?

117. Why are manhole covers round?

118. You are in the woods with owls and wolves. There are 22 eyes and 32 legs. How many owls and wolves are there?

119. When can ten plus ten equal ten, yet ten minus ten equal twenty?

120. Eat flush to my nose tree times for they buy dead by too. What is the answer?

121. A man owed his friend \$63 and repaid him the exact amount in cash without using coins or \$1 bills (no online transfers, checks, credit cards or any other tricks) and without requiring change. How did he do it?

122. Fill in the blanks with the same 4 letters to make 5 different words.

A ____ old woman on ____ bent, picked up her ____ and away she went. “____ my son” she was heard to say, “what shall we do to ____ today?”

124. Read this sentence.

Finished files are the re-
sult of years of scientif-
ic study combined with
the experience of years.

How many times does the letter F appear?

125. Without changing the order of these numbers, how can they equal 100?
3 5 6 2 54 5

126. A taxi driver runs through four red lights, two stop signs and goes through a house. A police officer witnesses this but doesn't do anything. Why not?

127. Suppose you have twelve eggs and a balance scale. All of the eggs are identical except for one whose only difference is its weight. Using the scale only three times, determine which egg is the odd egg out and whether it is heavier or lighter than the other eggs.

128. What number belongs at the beginning of this sequence?
?, 3, 2, 3, 9, 2, 4, 8, 4, 3, 7, 6

129. Imagine you're alone in a boat with a large hole in the bottom. Sharks are swimming around you on all sides and the boat is sinking fast. How do you survive?

130. A clock loses exactly ten minutes every hour. If the clock is set correctly at noon, what is the correct time when the clock reads 3:00pm?

131. A man is running across a field at night clutching something in his arms as several other men pursue him. He looks back and sees they're getting closer. In a final burst of effort his pursuers catch up and bring him crashing to the ground. His pursuers stand over him but do not touch him or take what he was carrying. Why not? Who was the running man?

132. Two cowboys live next door to each other and both have a corral for their cows in the back. One day they meet at the back of their homes, standing next to a wall dividing their corrals. The first cowboy gets to thinking and asks his neighbor for a cow so he can double his herd. The other cowboys replies, "That's fine by me partner, cuz then we'll have the same number of cows?" How many cows does each cowboy own?

133. On a dark, stormy Halloween night, four kids named Luke, John, Sarah and Bob walk into a haunted house during a blackout. Only one can escape. They take a staircase to the second floor, a trapdoor on the left, then go up the ladder to the right, followed by a 28-foot slide to the basement through the mouth of a Giant Panda. In one corner of the murky cellar is a chainsaw, a dagger, a rope with a noose and an electric chair. Written on the wall in blood are the words, "Only one will survive - choose your death!" Bob takes the rope, Sarah picks up the dagger, John chooses the chainsaw and Luke uses the chair.
Who survives?

134. What does this represent?
Pot OOOOOOOO

135. Given the numbers 1, 6, 7 and 9, find an equation that equals 24. You may only use each digit once.

136. O, S, C, Y, S, B, T, D, ?
What is the next letter in the sequence?

137. A red-house is made of red bricks, has a red wooden door and a red roof. A yellow-house is made of yellow bricks, has a yellow wooden door and a yellow roof. What is a green-house made of?

138. On a game show there are three closed doors - one hides a car and the other two conceal a goat. The contestant selects a door, which remains closed, and the host, knowing where the car is hidden, reveals a goat behind one of the remaining two doors. The contestant is then given the option to switch doors or stay with the one they originally selected. What should the contestant do to have the best chance of winning the car?

139. If a plane sits on a conveyer belt whose speed matches that of the plane in the opposite direction, can the plane take off?

140. Go back. You must strive to find a way to stay alive. What is 4+no.5?

141. What 6-letter word has the same pair of letters in spots 1 and 5, a different pair in spots 2 and 6 and contains a 'u' in between?

142. What letter comes next?
O T T F F S S

143. SO, ND, JF, MA, __, __
What are the next two pairs of letters?

144. Three rooms contain, 1) Gold coins, 2) Currency notes and 3) Cotton bags. If all three rooms catch fire, which room will the ambulance pour water on first?

145. Alfred and Bill are clerks at the local grocery store. Alfred can stock a shelf in 20 minutes, but Bill is new and takes 30 minutes. How long would it take for them to stock a shelf together?

146. Ralph goes to the hardware store to buy something for his house. He asks the clerk how much one will cost and the clerk looks it up and tells him it will be \$3. He asks about buying twelve and is told it will be \$6. Two hundred will cost \$9. What is Ralph buying?

147. Your are given the numbers 777, 888 and 999. Using the numbers once and adding, subtracting, multiplying or dividing, how can you make 999?

148. This problem can be solved by pre-school children in five to ten minutes, by programmers in an hour and by people with higher education...well, check it yourself.

8809 = 6
7111 = 0
2172 = 0
6666 = 4
1111 = 0
3213 = 0
7662 = 2
9313 = 1
0000 = 4
2222 = 0
3333 = 0
5555 = 0
8193 = 3
8096 = 5
1012 = 1
7777 = 0
9999 = 4
7756 = 1
6855 = 3
9881 = 5
5531 = 0
2581 = ?

149. A boat full of people goes under a bridge and when it comes out the other side not a single person is on it. How can this be?

150. Jim and Wanda both have some apples. If Jim gives Wanda an apple, they will both have the same number of apples. However, if Wanda gives Jim an apple, Jim will have twice as many as Wanda. How many apples do Jim and Wanda each have?

151. He was the perfect gentleman even though his nephew couldn't see it. Who was he?

152. From a basket of mangoes when counted in twos there was one extra,
counted in threes there were two extra,
counted in fours there were three extra,
counted in fives there were four extra,
counted in sixes there were five extra,
but counted in sevens there were no extras.
At least how many mangoes were there in the basket?

153. gges egsg segg esgg
What does this represent?

154. A man without eyes saw plums on a tree,
He didn't take plums nor plums did he leave.
How can this be?

155. What word can be written forward, backward or upside down while still remaining the same word?

156. Two days ago Lilly was 7 years old. Next year she will turn 10. How can this be?

157. How can you cross out four letters from the word LIVING to leave six remaining?

158. 011 235 813 213 ???
What comes next?

159. A women and daughter walked into a restaurant. A man walked past and the women both said, "Hello, Father". How is this possible?

160. When Randolph asked Hilda how old she was, Hilda replied that in two years she would be twice as old as she was five years ago. How old is Hilda?

161. The 17 items in your shopping cart weigh 8 pounds. But when your daughter puts in a ball, poster board and yo-yo the shopping cart weighs less. How is that possible?

162. A mother of three children had six apples. She gave two to each and yet 4 remained. How was this possible?

163. A dad offered to pay his son \$5 for every correct answer on his math test. His son said he would pay his Dad \$8 for every incorrect answer. There were 26 questions on the test and no money was exchanged. How?

164. If two hours ago it was as long after one o'clock in the afternoon as it was before one o'clock in the morning, what time is it right now?

165. A man walks out of a house that has four walls all facing north. A bird walks past him. What kind is it?

166. What is the longest word in the English dictionary?

167. What is special about the phrase, 'Race car'?

168. A man gets off the bus looking for an address and approaches a couple walking in the same direction for directions. The woman says they're going that way and take him. Along the way the man asks if they're related. The woman grins and says, "We're not strangers. This man's mother is my mother's mother-in-law." The man is confused but doesn't say anything. When he gets back home he tells his wife about the conversation and she can't figure it out either. They decide to ask their lawyer and he eventually works it out with pen and paper. How are the couple related?

169. A dad told his son he would give him \$5 for every correct answer on his math test. His son replied that he would pay \$8 for every incorrect answer. There were 26 questions on the test and no money was exchanged. Why?

170. How do you get 24 from 9, 6, 11 and 3 using addition, subtraction, multiplication or division?

171. Phil asks his friend Stan when his birthday is. Stan replies that he was 32 the day before yesterday and next year he'll be 35. When is his birthday and how is this possible?

172. A man wants to get into a night club where the bouncers test each person before they can enter. The man waits and watches. A woman walks up to the bouncers and the bouncers say 6. The woman replies with 3 and goes in. A small man walks up and they say 12. The man replies 6 and is admitted. The first guy thinks he's figured it out and walks up. They say 4 and the man replies with 2, but they don't let him in. What should he have said?

173. What is half of 8? (Hint: It's not 4)

174. Using all the digits from 1 to 7, what two numbers have the largest product? For example, 1234 x 567 = 699678 but you can do much better than that.

175. I have nine matchbox sticks and would like to make ten. How do I do it?

176. In 2012 a class was divided into 2 groups. Their assignment was to find the names of at least 3 children who were born on the same day from 5 different months of 2011. These were the results:

Group 1
August 20: Oliver, William, and Adam.
January 3: John, Alice, and Ken.
September 7: Bruce, Shane, and Peter.
June 11: April, Patrick, and Bobby.
July 19: Trent, Julie, and Charles.

Group 2
March 1: Karl, Willie, and Patty.
February 29: Blake, Kobe, and Wayne.
December 24: Kyle, Chad, and Zoe.
May 12: Matthew, Manny, and Adrian.
November 20: Greg, Fiona, and Elizabeth.

The members of group 2 got an F on the assignment. Why?

177. If you and a friend have the same amount of apples, how many does she need to give you in order to have 10 more apples than her?

178. What do the following words have in common?

far, blow, bacon, lather, fasting, wariness, pacemaker

179. How can you write a date in 5 letters without using any numbers?

180. How can the numbers 6, 1, 7 and 9 be arranged to make 24?

181. How many of each animal did Moses take on the ark?

182. How is 7 different from the rest of the numbers from 1-10?

183. There are six men carrying a box holding six cats and each cat has 6 kittens. How many legs are there in total?

184. Three ants are walking in the same direction. The first ant has two ants behind him, the second ant has one in front and one behind, but the third ant has one in front and one behind too. How is this possible?

185. What does this represent? BAN ANA

186. What is this phrase? XQQQME

187. You are a spy and need to send an item to a contact in another country without letting anyone else have access to it. All unlocked items will be opened in transit. How can you send this item securely?

188. What does this represent?

189. What does this represent?
esroh gnidir

190. How much dirt is there in a hole that measures two feet by three feet by four feet?

191. The defendant testified, "The attorney is my brother," but the attorney took the stand and denied having a brother under oath. Who is lying?

192. How could the 22nd and the 24th U.S. Presidents have the same parents, but not be brothers?

193. Dina comes from a large family and has over 20 cousins. How is it possible that all of her cousins have an aunt who is not her aunt?

194. A zebra was going to the river. On the way the zebra encountered five giraffes. Each giraffe had five monkeys on their neck. How many animals were going to the river?

195. What is the only word in the English dictionary that has a silent z?

196. James makes a bet with Laura that he can use any name she can think of in a song she will recognize with the original lyrics. Laura takes him up on the bet and loses. What song did James sing to win?

197. What is a six-word sentence that has the same meaning and spelling in both English and Afrikaans?

198. What do these words have in common?
1. Banana
2. Dresser
3. Grammar
4. Potato
5. Revive
6. Uneven
7. Assess

199. What phrase do these words sound like when rearranged?
amid eerie niger won spawn

200. At the market you can buy a cow for \$10, a pig for \$1 and 8 hens for \$1. How many animals would you need to buy to get 100 mixed animals for exactly \$100?

201. A man goes to bed at 9:45 pm. He makes himself a drink, then turns off the TV and the lights. The night was windy and there was a major storm. The next day he discovers he was the cause of seven deaths. How is this possible?

202. An electric train is traveling on a 2000-mile journey from Chicago, IL to Los Angeles, CA. It has 16 cars with a total of 320 passengers. The weather is cloudy and cool, with a warm front approaching from the south. Which direction will the steam blow?

203. Franklin lent Darlene as much money as she already had, then she spent \$10. The next day, Franklin lent her as much money as she now had and again, she spent \$10. On the third day Franklin once again lent her as much money as she now had and she spent \$10, leaving her broke. How much money did Darlene start with?

204. A farmer had 17 sheep. All but 9 died. How many live sheep does he have left?

205. There was a neighborhood of one-story houses.
One was red and everything in the house was red.
Another was purple and everything in the house was purple.
Yet another was yellow and everything in the house was yellow.
Still another was blue and everything in the house was blue.
In the green house everything was greeen,
and in the gray house everthing was grey.
What color were the stairs in the yellow house?

206. What does this represent? 13579U

207. What is this? H2O autumn

208. What does this mean? lainws

209. Peppino bought a new hat and Tito asked what day he bought it. Peppino replied, "If yesterday was tomorrow, today would be Tuesday." On what day did Peppino buy his hat?

210. What does this represent?
COF FEE

211. A man hiked through the woods with his dog and saw three coyotes, six wolf cubs, seven bunnies, nine squirrels and thirteen chipmunks. How many total feet were there?

212. Which word is always spelled wrong?

213. What keys don't unlock any doors?

214. Kevin, Charles, Larry and Alex are in a room that's about 110 feet long. In front of them are 5 balls which are exactly 100ft from the exit. The balls are yellow, purple, green, red and blue, respectively. Each man must carry a ball to the exit. After traveling 20ft a ball will change color twice. The sequence of color changes is always the same: yellow, purple, green, red, and blue.
At 80ft Kevin's ball is red. At 40ft Larry's ball is purple. At 60ft Charles' ball is blue and at 100ft Alex's ball is purple. What color ball was left behind?

215. Five kinds of flowers grow in separate gardens on five different streets. Here is what you know:
1. The Smiths do not grow violets.
2. The Morgans grow peonies and do not live on 2nd street.
3. The Parks live on 3rd street.
4. Begonias bloom on 4th street.
5. Roses do not grow on 5th street.
6. The Johnsons do not live on 1st street.
7. The Rosens do not grow daffodils
8. The Johnsons grow roses
9. Daffodils grow on 1st street

Which flowers grow on in whose gardens on what streets?