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Question

___ is a pair of co-prime numbers.

A
12, 15
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B
7, 15
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C
22, 48
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D
24, 36
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Solution

The correct option is B 7, 15

If any two numbers Highest Common Factor is 1, then they are called co-prime to each other.

HCF of 12 and 15 is 3
HCF of 7 and 15 is 1
HCF of 22 and 48 is 2
HCF of 24 and 36 is 12

Therefore 7, 15 is a pair of co-prime numbers since they have an HCF of 1.


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