Which one of the following pairs of numbers is not coprime?

14,17

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21,35

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18,19

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15,22

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Solution

The correct option is B 21,35
14, 17 - no common factor except 1.
Hence, they are coprime numbers

21, 35 - 7 is a common factor.
Hence, they are not coprime

18, 19 - no common factor except 1.
Hence, they are coprime numbers

15, 22 - no common factor except 1.
Hence, they are coprime numbers

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Similar questions

Which of the following pairs are coprime numbers

Question 35
Which of the following pairs is not coprime?

(A) 8, 10
(B) 11, 12
(C) 1, 3
(D) 31, 33

231, 396

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