The product of (672 ÷ 6) and 3rd multiple of 3 gives X. Taking away 378 from X gives Y. Find the sum of the common prime factors of X and Y.
A 7
B 10
C 12
D 9
The product of (672 ÷ 6) and 3rd multiple of 3 gives X. Taking away 378 from X gives Y. Find the sum of the common prime factors of X and Y.
A 7
B 10
C 12
D 9