NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 89

Find the value of (?) in the series 3, 4, 6, 8, 12, ?, 18 A. 13 B. 14 C. 15 D. 19

  1. C

  2. A

  3. D

  4. B

Show answer & explanation

Answer: (D) B

Explanation

Each term is one more than a prime number: 2 + 1 = 3, 3 + 1 = 4, 5 + 1 = 6, 7 + 1 = 8, 11 + 1 = 12, 13 + 1 = 14, 17 + 1 = 18. So the missing term is 14.