What is the sum of the greatest common factor and the lowest common multiple of 72 and 36? Choose the correct choice from the following answers
A) 192
B) 220
C) 224
D) 108
E) 284
Prime factorization of 36 = 2 x 2 x 3 x 3   Prime factorization of 72 =2 x 2 x 2 x 3 x 3   GCF = 36   LCM = 72   Sum = 108.   Answer 108.
<result>D</result>
What is the sum of the greatest common factor and the lowest common multiple of 72 and 36?