The ratio of two numbers is 4 : 5, and their HCF is 3. What is their LCM?
Answer & explanation
Correct answer: option 3
The ratio of two numbers is 4 : 5.
HCF is 3
So, the number becomes
4 × 3 = 12
5 × 3 = 15
As, we know
L.C.M × H.C.F = Product of two numbers
L.C.M × 3 = 12 × 15
L.C.M = 60