I received the following brain teaser by e-mail and posted it to my brain teasers page. I hadn’t yet figured it out and hoped someone else would help me out.
Well, it’s now exactly one month from when I received it, and yesterday I finally got the answer. I wouldn’t dream of ruining the fun of figuring it out for anyone else, so here’s the riddle sans answer.
What are their ages?
In the end, I had to pull out ye ol’ linear algebra from college to figure out the answer. There are others ways, but I didn’t have much success with them.
I may post a few hints in the comments, depending on how difficult it is for others to figure out.
Spoiler Warning: Answers are in the comments, so if you want to figure it out yourself, don’t scroll down.