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# What are three common multiples of 15 and 20?

Updated: 9/18/2023

Wiki User

11y ago

15 & 20 have an infinite number of Common Multiples; the first three are 60, 120 and 180.

Wiki User

11y ago

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Q: What are three common multiples of 15 and 20?
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60, 120 and 180

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The common multiples of 9, 15, and 20 are an infinite set of multiples of their least common multiple, which is 180. so the common multiples of 9, 15, and 20 are 180, 360, 540, 720, 900, 1080, 1260, 1440, 1620, 1800, and so on.

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The multiples of 20 are 20, 40, 60, 80, 100, 120... The multiples of 30 are 30, 60, 90, 120, 150... The multiples of 15 are 15, 30, 45, 60, 75, 90, 105, 120, 135... The common multiples of 20, 30, and 15 are 60, 120, 180, 240...

LCD= 60

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60 and 8,220

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