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Railways PYQCBT 1 2016

RRB NTPC · Question 33

__________ are twin prime number. A. (4, 9) B. (2, 3) C. (4, 6) D. (3, 5)

  1. B

  2. C

  3. A

  4. D

Show answer & explanation

Answer: (D) D

Explanation

Twin primes are pairs of prime numbers that differ by 2, such as (3, 5), (5, 7) and (11, 13). (2, 3) differ by 1, and 4, 6 and 9 are not prime.