This math question went viral yesterday, hailing from Singapore. It said that it was a math question for primary 5 students, which will you leave you stumped because most adults probably can't solve it.

The math question is actually for a contest from the Singapore and Asian Schools Math Olympiad, and is meant for Secondary 3 and 4 students. Still very hard!

Here's the question:

Cheryl, tells Albert what month her birthday is (May, June, July, or August) but not the day's number (the 14th - 19th), and she tells Barnard the number, but not the month.

Just like Cheryl!

Obviously, Cheryl is either trying to tease the two boys, or is just plain lousy at communication. Here's how to solve the question: