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Using the listing multiples method, what is the least common multiple of 15 and 20?

A30
B100
C60
D300
Answer & Solution
Correct answer: C. 60
1. List several multiples of 15: 15, 30, 45, 60, 75, and so on. 2. List several multiples of 20: 20, 40, 60, 80, and so on. 3. The smallest number appearing on both lists is 60. 4. So the least common multiple of 15 and 20 is 60. _Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 1 "Foundations", section 1.1 Introduction to Whole Numbers_
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