The Weekend Edition Saturday Math Guy, Stanford professor Keith Devlin, has a problem. In fact, he has more than one... which he's happy to share with Scott Simon. What is the probability that in a ...

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 ...

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 ...

Can you figure out when Cheryl’s birthday is? A puzzling logic problem for middle school “mathletes” in Singapore has gone viral online. After a television host in Singapore posted the question to his ...

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 ...