1 = Not Possible 2 = Not Possible 3 = Not Possible 4 = 2 + 2 5 = 2 + 3 6 = 3 + 3 7 = 2 + 5 8 = 3 + 5 9 = 2 + 7 10 = 3 + 7 Taking into account that there must be two "Different" prime numbers, that leaves 5, 7, 8, 9, and 10. So 5 of the first 10 whole numbers.