The correct answer is: c) 46 and 87
Further explanation:
Let us define relatively prime numbers first:
"Relatively prime numbers are those numbers whose greatest common factor is 1"
So,
a) 20 and 76
The GCF is 4 so the pair is not relatively prime.
b) 25 and 65
The GCf is 5 so the pair is not relatively prime.
c) 46 and 87
GCF is 1 so the pair is relatively prime.
d) 63 and 117
GCF is 9 so the pair is not relatively prime.
Hence, option C is correct
Keywords: Prime numbers, Relative prime numbers, Coprime numbers
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