Get out your timer and number two pencil to see if your arithmetic skills are still sharp.

An apparently easy-looking math problem has left internet users scratching their heads. The elementary-grade problem looks simple enough to solve in seconds, but has tripped up the masses. The basic ...

Number theorists are always looking for hidden structure. And when confronted by a numerical pattern that seems unavoidable, they test its mettle, trying hard—and often failing—to devise situations in ...

A mathematician may have just proved the impossible possible. For 30 years, mathematicians wondered if you could have an infinite set of numbers where each pair of numbers adds up to a unique value, ...

Students with learning disabilities and other challenges may find word problems difficult even when they know the math, so ...