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Common multiples are multiples that are common to two or more numbers.

9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, 117, 126, 135, 144, 153, 162, 171, 180, 189

21: 21, 42, 63, 84, 105, 126, 147, 168, 189

The first 3 common multiples of 9 and 21 are 63, 126 and 189.
63, 126, 189.

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Wiki User

βˆ™ 6y ago
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ndeni kimaro

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βˆ™ 2y ago
Thank you so much
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William Dinette

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βˆ™ 2y ago
thx so helpful
WHAT OMG TYSM I HAVE THIS FOR HOMEWORK I HAVE BEEN DOING IT SINCE 1 HOUR
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Wiki User

βˆ™ 7y ago

63, 126, 189.

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Chase Courduff

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βˆ™ 4y ago

I63

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Anonymous

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βˆ™ 4y ago

63, 126, 252

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Anonymous

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βˆ™ 4y ago
63, 126, 252 are the first 3

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Anonymous

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βˆ™ 4y ago

17

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Q: What are the three first common multiples of 9 and 21?
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If that's 9, 14 and 21, the first three common multiples are 126, 252 and 378.


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What are te first three common multiples of 9 and 21?

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