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What are the co-prime factors of 42?

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(1,42), (3,21), (3,16), (9,7)

(1,42), (2,24), (4,14), (8,7)

(1,42), (2,21), (3,14), (6,7)

(1,42), (2,26), (8,17), (6,7)

answer is C.

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Detailed Solution

Co-prime numbers do not have any factor in common other than 1. For example, 3 and 14.

The positive pair of co-prime factors of 42 are (1,42), (2,21), (3,14), and (6,7).

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