The product of two numbers is 1600 and their HCF is 5. The LCM of the numbers is (a) 8000 (b) 1600 (c) 320 (d) 1605

Correct Answer: (c) 320

Explanation:

Let the two numbers be x and y.

Given,

x × y = 1600

HCF = 5

HCF × LCM = x × y

5 × LCM = 1600

LCM = 320