

Divisible by 3?


Everyone knows that a number with its units digit equal to 0, 2, 4, 6 or 8 is evenly divisible by two. Here’s a handy way to figure out if a number is divisible by 3. If the sum of the digits of the number in question is evenly divisible by 3 then that number also is divisible by 3.


Is 64,332 evenly divisible by 3?
Sum the digits of the number: 6 + 4 + 3 + 3 + 2 = 18
The answer is 18 which is evenly divisible by 3, so 64,332 is evenly divisible by 3.

A nice quick way to find out if 3 is a factor of a number or not!

posted under Math
2 Comments to

“Divisible by 3?”

  1. Avatar October 18th, 2011 at 9:14 pm Ella Brown Says:

    This example made it so easy to understand for my granddaughter!!

    Thanks guys!

    Love the website!!

  2. Avatar August 24th, 2014 at 1:19 pm Ron Fischman Says:

    Thanks, Ella! I’m really happy that our site helped. I’ve been writing on math and the brain in our blog, trying to bring the research down from the mountain. I hope you enjoy it, and that your granddaughters keep playing!

Math Nook is owned by Jan and Tommy Hall.

