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Railways PYQCBT 1 2016

RRB NTPC · Question 57

A prime number A. is not a positive integer. B. has no divisor at all. C. has only 1 and itself as divisors. D. has more than two divisors.

  1. B

  2. D

  3. A

  4. C

Show answer & explanation

Answer: (D) C

Explanation

A prime number is a natural number greater than 1 that has exactly two divisors: 1 and itself. Examples are 2, 3, 5, 7 and 11. A number with more than two divisors is composite.