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Railways PYQCBT 1 2016

RRB NTPC · Question 47

Find the absent values of 20, 30, 42, 56, 72, ______. A. 80 B. 92 C. 90 D. 84

  1. B

  2. A

  3. C

  4. D

Show answer & explanation

Answer: (C) C

Explanation

20 = 4 × 5, 30 = 5 × 6, 42 = 6 × 7, 56 = 7 × 8, 72 = 8 × 9, so next is 9 × 10 = 90.