Posted by wan on Tuesday, November 13, 2012 at 5:29pm.
Go through the numbers 1 through 100, cross out all the numbers that are divisible by 2 (except 2), then the numbers that are divisible by 3(except three), then the numbers that are divisible by 5 (4 should be crossed out because it was divisible by 2) Do this all the way up to 50
Count the number of primes
2, 3, 5, 7, 11, 13, 17, 19 . . .
Divide this by 100