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Railways PYQCBT 1 2016

RRB NTPC · Question 45

If the mathematical operator ‘+’ means ‘÷’, ‘-‘ means ‘+’, ‘÷’ means ‘×’ and ‘×’ means ‘-‘, then the value of 17 - 7 ÷ 27 + 3 × 79 is A. -1 B. 0 C. 1 D. 2

  1. B

  2. D

  3. A

  4. C

Show answer & explanation

Answer: (D) C

Explanation

Replacing the symbols: 17 − 7 ÷ 27 + 3 × 79 becomes 17 + 7 × 27 ÷ 3 − 79. Multiplication and division first: 7 × 27 = 189 and 189 ÷ 3 = 63. Then 17 + 63 − 79 = 1.