Mathematics: Divisibility tests

By Kermit1941 - About Me - E-mail this page - Add to My Favorites - Add to Blog List - See other blogs in Science & Nature

Friday, April 4, 2014

Divisibility tests

A positive integer, written in base 10, is divisible by 2 if and only if its rightmost digit is divisible by 2. A positive integer, written in base 10, is divisible by 3 if and only if the sum of its digits is divisible by 3. A positive integer, written in base 10, is divisible by 4 if and only if... Sign in to see full entry.

Previous: Spliting the pie - New Entries - Next: Fermat Factoring by difference of squares

Headlines (What is this?)