NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2020

RRB NTPC · Question 92

Select the number from among the given options that can replace the question mark (?) in the following series. 69, 55, 26, 13, ?

  1. 2

  2. 5

  3. 3

  4. 4

Show answer & explanation

Answer: (D) 4

Explanation

Each term is the product of the digits of the previous term plus 1: 6 × 9 + 1 = 55, 5 × 5 + 1 = 26, 2 × 6 + 1 = 13, 1 × 3 + 1 = 4.