Question

what is prime factorization of 510

Answer 1

510 ends in 0 so it's divisible by 10.

51 x 10 = 510

10 = 5 x 2

and 51 is prime so 510 = 51 x 5 x 2

Answer 2

17 x 3 x 5 x 2

Answer 3

Oh man. 51 was not prime. :-p 5 + 1 = 6 so it's divisible by 3. :( Sorry.

Answer 4

Quick list of divisibility rules: http://math.about.com/library/bldivide.htm