0
Wiki User
7x9=63
47
1827
63 and 65 are the number
189
64
3 x 63 = 189 3 + 63 = 66
1 x 63, 3 x 21, 7 x 9
79
255
63
no if you multiply two primes for example 7x9=63 63 is not prime because 9 and 7 go into it