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What is the least common denominator of 9,7, and 10?

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The least common denominator of 9,7, and 10 is 630. To calculate, use the factor tree formula for each of the numbers and then multiply the factors.

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1

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1 is the Greatest Common Factor
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63

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But 10 doesn't go into 63, right?
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I plead temporary insanity. It's 630.
Thanks!
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