Finding how many numbers are divisible by a prime number I'm trying to figure out how I can find out how many numbers are divisible by a certain prime (eg 3) in a certain range, eg 0-10000. I think it has something to do with permutations, but I'm not really sure and kinda stuck.
Could you please point me in the right direction or so?

All you have to do is divide and throw away any remainder: $\textrm{floor}(10000/3)$
