lcm of 10 and 15 — step-by-step solution

To calculate the LCM (least common multiple), we first decompose the numbers into prime factors.

10

2 \times 5

15

3 \times 5

We keep every prime factor that appears, with its greatest exponent.

▶

ppcm (10, 15)

2 \times 5 \times 3

30