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Railways PYQCBT 1 2020

RRB NTPC · Question 9

Out of the four number-pair listed, three are alike in some manner and one is different. Select the odd one.

  1. 7-27

  2. 4-64

  3. 6-216

  4. 9-729

Show answer & explanation

Answer: (A) 7-27

Explanation

In 4-64, 6-216 and 9-729 the second number is the cube of the first. 7³ = 343, not 27, so 7-27 is the odd one.