Archive | Divisibility by 3

How to See Why the Divisibility Trick for 3 Works

There’s a nifty trick for finding out if 3 divides evenly into a number. This little proof shows why the trick works.

(Divisibility) Practice Makes Perfect

Practice problems for reducing fractions. Use divisibility tricks to reduce fractions.

Divisibility: Find out if 3 divides evenly into an integer

Learning the divisibility tricks speeds up mental math. How to know if 3 divides into a number evenly? This blog tells you how