Question

Find the LCM set of numbers using prime factorisation method.

10, 15

Answer 1

10, 15

10 = 2 × 5

15 = 3 × 5

Product of common factors = 5

Product of other factors = 2 × 3 = 6

LCM (10, 15) = Product of common factors × Product of other factors

= 5 × 6

= 30

LCM (10, 15) = 30