Dear Charlie,
I imagine you've read about the Singapore math questions that made the world buzz
Have you already tried figuring this logic puzzle out?
As you know, I'm myself fully uncapable of making heads or tails of it.
But I thought, you might want to give it a try.
http://www.theguardian.com/science/alexs-adventures-in-numberland/2015/apr/13/can-you-solve-the-singapore-primary-maths-question-that-went-viral
http://www.nytimes.com/2015/04/15/science/a-math-problem-from-singapore-goes-viral-when-is-cheryls-birthday.html
If you want to check if you got it. Here's the solution:
http://www.theguardian.com/science/alexs-adventures-in-numberland/2015/apr/13/how-to-solve-albert-bernard-and-cheryls-birthday-maths-problem
http://www.nytimes.com/2015/04/15/science/answer-to-the-singapore-math-problem-cheryl-birthday.html
Good luck!
Mrs. C.
