Today is Cinco de Mayo. And this year, the fifth of May is filled with mathematical joy. It is — Square Root Day! It all started in 1981. "I was writing a check in late August," says Ron Gordon, who ...

Roots are the reverse of powers. For example, a square root is the reverse of a square number. So \(5^2 = 25\) and \(\sqrt{25} = 5\) A cube root is the reverse of a cube number. Write 40 as a product ...

Once a century, a very special day comes along. That day is today — 9/16/25. Pi Day (3/14) often comes with sweet treats; Square Root Day (4/4/16 or 5/5/25, for example) has a certain numerical rhyme.