Every $N$ possible is divisible by 3 bc every number that has digits adding to a multiple of three is divisible by 3. so the answer is 24 bc 24 is four factroial which is the number of possiblities there are.

would'nt that just be 100?

Not to be rude but those two sides of the equation aren't equal. The first one is equal to around 31 and the second is equal to around 35.

Here you go.

HELP

Just for you.