1.This paper studies the numeral divisibility characteristic of round number, and solves the problem in theory about the divisibility characteristic of any round number.
2.Here again, the Pythagoreans, who had argued for the reality of space and therefore of its divisibility, would have to say that the moving arrow must at every moment occupy a particular position in space.
3.It comes from counting how many of the numbers from 1 up to 710 don't share any prime factors with 710. These are the ones that we can't rule out for including primes based on some obvious divisibility consideration.