If the product of two numbers is 17820 and their H.C.F. is 12, find their L.C.M.
Select
A) 2574
B) 2500
C) 1485
D) 1574
E) none of these

Rationale: "explanation : hcf * lcm = 17820 , because we know product of two numbers = product of hcf and lcm lcm = 17820 / 12 = 1485 option c"
Answer: C