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Two multiples of any number greater than one can't be co-prime. They would always have that number as a common factor.

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Q: Which two multiples of 13 are co prime numbers?
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Which two multiples of 13 are co-prime number?

No multiples of the same number greater than one can be co-prime, since they will both have that number as a factor.


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It can be. Since 13 is a prime number, it is relatively prime to all other numbers except for multiples of 13.


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