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5 and 7 are prime numbers. and 3 goes into 9, so the only number that goes into 5, 7, and 9 is 1. They are what we call "relatively prime", even though 9 is not prime, because they have no common factors other than 1.

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โˆ™ 2011-01-11 22:43:56
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Q: What number goes into 5 7 and 9?
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