What are the numbers divisible by three?

The rule of thumb is that if the sum of the digits of the number equals a number that is divisible by 3, then the number is divisible by 3.For example,372: 3+7+2 = 12, which is a multiple of 3...

You would fill in the blank with the word sum, which means that you add each of the digits of the number. If that sum is divisible by three then the number is divisible by 3.

24

A number divisible by three means you can make it into three groups. For example: 9 divided by 3 equals 3 because 3+3+3=9. Or 3x3=9.

ITs 30 cuz 30 divided by three is 10 and 30 divided by five is six