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Which pair of numbers is relatively prime? A. 5 and 75 B. 12 and 51 C. 7 and 20 D. 15 and 21
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Which pair of numbers is relatively prime? A. 5 and 75 B. 12 and 51 C. 7 and 20 D. 15 and 21

User Matiferrigno
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The answer is C 7 and 20
User Mph
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The only number not divisible by anything except itself and 1, was C. 7

User Ryoung
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