What is the sum of the greatest common factor and the lowest common multiple of 16 and 72?
Select
A) 142
B) 152
C) 124
D) 160
E) 184
Prime factorization of 16 = 2 x 2 x 2 x 2.   Prime factorization of 72 = 2 x 2 x 2 x 3 x 3   GCF = 8   LCM = 144   Sum = 152.   Answer 152.
<result>B</result>
What is the sum of the greatest common factor and the lowest common multiple of 16 and 72?