The least common multiple (LCM) of 15 and 10 is 30.

Quick Scoop

To see why the answer is 30, think about the multiples of each number.

  • Multiples of 10: 10, 20, 30 , 40, 50, 60, …
  • Multiples of 15: 15, 30 , 45, 60, 75, …

The first (smallest) number that appears in both lists is 30, so that is the least common multiple of 15 and 10.

In simple terms: 30 is the smallest number that both 10 and 15 divide into evenly, with no remainder.

TL;DR: LCM(15, 10) = 30.

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