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Railways PYQCBT 1 2016

RRB NTPC · Question 94

If ‘+’ and ‘÷’, ‘×’ and ‘-‘ are interchanged in the equation : 17 ÷ 7 – 27 + 7 × 37, then its value will be A. 7 B. 17 C. 27 D. 37

  1. A

  2. C

  3. D

  4. B

Show answer & explanation

Answer: (A) A

Explanation

After swapping + ↔ ÷ and × ↔ −, the expression 17 ÷ 7 − 27 + 7 × 37 becomes 17 + 7 × 27 ÷ 7 − 37. Multiplication and division first: 7 × 27 = 189 and 189 ÷ 7 = 27. Then 17 + 27 − 37 = 7.