An ingenious, recently developed method tests if a number is divisible by 7.

Why do we have leap years? The math behind this is interesting, and has to do with Earth's spin and orbit around the Sun.

The Mathematics Teacher (MT), an official journal of the National Council of Teachers of Mathematics, is devoted to improving mathematics instruction from grade 8-14 and supporting teacher education ...

Morgan Ward, Memoir on Elliptic Divisibility Sequences, American Journal of Mathematics, Vol. 70, No. 1 (Jan., 1948), pp. 31-74 ...

After multiplication, it is time to learn certain divisibility rules to ease our calculations. The basic rules for divisibility by 2, 3, 5, 9, 11 are fairly we ...

These numbers, divisible only by themselves and one, appear deceptively random yet hide intricate patterns. Unlocking the secrets of their distribution could illuminate vast areas of mathematics ...