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Railways PYQCBT 2 2017

RRB NTPC · Question 73

What will be the next set of numbers in the series? (2, 3), (3, 5), (5, 7), (7, 11), (11, 13), _______

  1. (13, 15)

  2. (15, 17)

  3. (13, 17)

  4. (13, 19)

Show answer & explanation

Answer: (C) (13, 17)

Explanation

Each pair is two consecutive prime numbers: (2, 3), (3, 5), (5, 7), (7, 11), (11, 13). The next pair is (13, 17).