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Q.

Which of the following pairs are co-prime?


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a

348 and 296

b

56 and 97

c

3025 and 4920

d

None of these 

answer is B.

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Detailed Solution

Concept- Co-prime numbers are a group of numbers that share only one common factor, implying that their highest common factor (HCF) is 1.
Two integers a and b are seen to be relatively prime, mutually prime, or coprime in number theory if the only positive integer that divides them is 1.
One is the only positive integer that divides 59 and 97.
Therefore, 56 and 97 are co-prime.
Hence, the correct answer is option 2) 56 and 97.
 
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