We can calculate our age in dog years, so why not Leap Day years? Unlike the canine formula — anyone can multiply their age by 7 to get the answer — the Leap Day math applies to people born on Feb. 29 ...

Cheryl's birthday puzzled Albert, Bernard and a bunch of kids from Singapore. Here's the definitive way to figure it out Get daily headlines and breaking news alerts for FREE by signing up to our ...

A maths problem set for teenagers taking the Singapore and Asian Schools Maths Olympiads (SASMO) has gone viral for one reason. It’s impossible.* “When is Cheryl’s birthday?” is the question and the ...

Never mind the color of that dress: When is Cheryl's birthday? The latest viral puzzler to stump the Internet started out as a question for students in Singapore and spread around the world after it ...

Why does Leap Day occur once every four years? Our calendar is not entirely in sync with our planet's trip around the sun. If your birthday is on Feb. 29, what date do you use for official documents ...

Cheryl tells Albert her birth month, and tells Bernard the day of her birthday. Albert: I don’t know when Cheryl’s birthday is, but I know that Bernard does not know too. Bernard: At first I don’t ...