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  9. Q6

TNPSC Group-I 2022 · Question 6 of 12

Which one of the following is a pair of coprimes?

Mathematics

  1. A(16, 62)
  2. B(18, 25)Correct
  3. C(21, 35)
  4. D(23, 92)

Answer: B. (18, 25)

Explanation

18 and 25 have 1 as their only common factor, so they are coprime. The other pairs share a common factor greater than 1.

Source: Appolo Study Centre compilation of TNPSC Group-I Preliminary Examination 2022 tentative key (with solution)

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