How to Test if a Number is Evenly Divisible by 3
Learn this trick to find out whether a number is evenly divisible by three.
By
Jason Marshall, PhD
Jason Marshall, PhD
February 23, 2012
1 minute read
To check if a number is evenly divisible by 3, see if the sum of all the digits in the number is evenly divisible by 3. If so, the number itself must be evenly divisible by 3 too. For more, see How to Tell If a Number is Divisible by 2 or 3
About the Author
Jason Marshall is the author of The Math Dude’s Quick and Dirty Guide to Algebra. He provides clear explanations of math terms and principles, and his simple tricks for solving basic algebra problems will have even the most math-phobic person looking forward to working out whatever math problem comes their way.