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 ...

Hal and Carol accept an invitation to a house party. Hal sees that there will be 30 people attending the party and says to Carol, “I bet you $100 that at least two people will have the same birthday ...

A math problem intended to identify the top 40% of students has become the obsession of the Internet. The seemingly simple question: ‘When is Cheryl’s birthday?’ You can save this article by ...

Your support goes further this holiday season. When you buy an annual membership or give a one-time contribution, we’ll give a membership to someone who can’t afford access. It’s a simple way for you ...

Are you smarter than a really smart Singapore high school student? See if you can figure out Cheryl’s birthday, the Singapore logic problem that’s got the Internet twisted into knots. Some are even ...

Cheryl asks Bernard and Albert to work out her birthday but a simple question from a test in Singapore has left the internet asking: what is Cheryl's birth date? Cheryl gives her new friends Albert ...

The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. Kennethjianwen's ...

Are you smarter than a really smart Singapore high school student? See if you can figure out Cheryl’s birthday, the Singapore logic problem that’s got the Internet twisted into knots. Some are even ...