Which of the following pair co prime 12,15
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15 is the pair of co prime numbers
because 15 = 3 * 5 and 3and 5 are co primes
whereas 12 = 3 * 4 and 3 is a co prime but 4 is a product of 2 *2 , not a co prime . therefore 15 is a pair of co prime but 12 is not .
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