Two numbers N and 10 have LCM = 36 and GCF = 5. Find N.  Choose the correct answer.
A) 35
B) 56
C) 76
D) 18
E) 24

Rationale: "the product of two integers is equal to the product of their lcm and gcf . hence . 10 * n = 36 * 5 n = 36 * 5 / 10 = 18 correct answer d"
Answer: D