If the L.C.M of two numbers is 720 and their product is 38880, find the H.C.F of the numbers.
Choose the correct choice.
A) 50 B) 30 C) 125 D) 54 E) none of these

Rationale: "h . c . f = ( product of the numbers ) / ( their l . c . m ) = 38880 / 720 = 54 . answer : d"
Answer: D