What is the sum of the greatest common factor and the lowest common multiple of 72 and 36?
Select:	A) 120	B) 150	C) 145	D) 108	E) 112
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   Ans: 108
<result>D</result>
What is the sum of the greatest common factor and the lowest common multiple of 72 and 36?