Question

1. Which of the following is a pair of co-primes?
(a) (14, 35) (b) (18,25) (c) (31,93)
(d) (32, 62)​

Answer 1

Answer:

For option (d), 32 and 62: The factors of 32 are 1, 2, 4, 8 and 16 and the factors of 62 are 1, 2 and 31. Here 14 and 35 have two common factors: they are 1 and 2. Hence, their HCF is 2 and they are not co-prime.

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Answer 2

Correct option- (b) (18,25)

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