Divisibility Rule for 3

Rule for 3 are all whole numbers who`s sum are divisible by 3.

For example:

Is the 2601 divisible by 3?

Yes! because 2+6+0+1=9 and 9 is multiple by 3.

Is the 4567 divisible by 3?

No! because 4+5+6+7= 22 and 22 is not multiple of 3.

Here is the picture and video!!