In math, a permutation is the number of ways a set can be arranged. For example, there are two permutations for a set consisting of the numbers 2 and 7 (the permutations are 2,7 and 7,2).

SUMMERS: The 14-year-old from India has set the Guinness World Record for mental calculation. SHAPIRO: He's been dubbed the human calculator and can solve complex math problems in his head in seconds.

A Big Year in Graph Theory. If there is one area of math that was particularly fruitful in 2023, it’s graph theory. One of the biggest mathematical discoveries of the past year was the proof of a new, ...

Teaching set theory to six-year-olds as a way into mathematics, from arithmetic on, would come to be considered misguided, overcomplicating the basics and introducing jargon. Yet however radical a ...