Most people know just one way to multiply two large numbers by hand. Typically, they learned it in elementary school. They’re often surprised to find that there are a variety of ways to do ...

Nathan Liu was up by one point against his opponent, Brandon Ni of Massachusetts, in the final round of the “Countdown Round” of the 2025 RTX MATHCOUNTS National Competition. The presenter didn’t get ...

A lot of students begin by finding a common denominator for the dividend and divisor when dividing by a fraction. And a lot of teachers intervene by saying, “Remember, you only need a common ...