What is all the numbers divisible by 7?

Answer 1

If you add all the digits up in one number, then divide it by 3 and it comes out even, that number is divisible by 3.

Example: 32,112

3 + 2 + 1 + 1 + 2 = 9

9/3 = 3 So 9 is divisible by 3 and that is how you know if a certain number is divisible by 3.

To list all the numbers divisible by three would be impossible. 3, 6, 9 and just keep adding three until you get to infinity.

Answer 2

1-7

Answer 3

1