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Railways PYQCBT 2 2017

RRB NTPC · Question 31

If A denotes ÷, B denotes ×, C denotes + and D denotes -, then which of the following statements is true?

  1. 11 B 34 A 17 D 8 A 3 = 38/3

  2. 6 B 18 D 26 A 13 C 7 = 173/13

  3. 32 C 8 A 16 D 4 = -3/4

  4. 9 C 9 A 9 D 9 B 9 = -71

Show answer & explanation

Answer: (D) 9 C 9 A 9 D 9 B 9 = -71

Explanation

Option 4 becomes 9 + 9 ÷ 9 − 9 × 9 = 9 + 1 − 81 = −71, which is true. Checking option 1: 11 × 34 ÷ 17 − 8 ÷ 3 = 22 − 8/3 = 58/3, not 38/3, and options 2 and 3 also fail.