Question

What is the least common multiple of 14, 20, and 15?

Answer 1

14, 15, 20 | 2

7, 15, 10 | 2

7, 15, 5 | 3

7, 5, 5 | 5

7, 1, 1 | 7

1, 1, 1

Answer: $\bf2^{2}$ × 3 × 5 × 7 = 420

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Answer 2

14 = 2 x 7

20 = 2² x 5

15 = 3 x 5

LCM = 2² x 3 x 5 x 7 = 420

Answer: LCM = 420