Multiple choice

Which of the following is a pair of co-prime numbers?

  1. 11, 13

  2. 14, 15

  3. 23, 29

  4. All of the above

  5. 51, 53
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All of the above are pairs of co-prime numbers. 51 = 17 x 3 x 1 53 = 53 x 1 H.C.F. = 1 Therefore, it is a pair of co-prime numbers.

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