One Hundred Problems Involving the Number 100: A Collection of Problems to Celebrate NCTM’s First Century

Share the wonder, joy, beauty—and fun—of mathematics with these 100 problems.

The problems in One Hundred Problems Involving the Number 100 celebrate the “Goldilocks” charm of 100—a number not too small, not too large, but just right to challenge students without intimidating them. It’s used in myriad ways within the problems: as an exponent, product, area, or perimeter; a constant in an equation; the number of items in a series or sequence; or as a physical value, such as a stack of 100 coins, a deck with 100 cards, or a jug that holds 100 ounces. There is something magical about the number 100, and these problems aim to capture some of that magic. But no matter how 100 is used, each problem is meant to spark curiosity and motivate students (and their teachers) to want to solve it.