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Railways PYQCBT 1 2016

RRB NTPC · Question 79

If the mathematical operators, ‘×’ means ‘+’, ‘÷’ means ‘×’ , ‘+’ means ‘-’, and ‘-’ means ‘÷’, then 22 + 36 – 12 × 6 ÷ 4 = ?

  1. -21

  2. 43

  3. 68

  4. 53

Show answer & explanation

Answer: (B) 43

Explanation

With × → +, ÷ → ×, + → − and − → ÷, the expression 22 + 36 − 12 × 6 ÷ 4 becomes 22 − 36 ÷ 12 + 6 × 4. Division and multiplication first: 36 ÷ 12 = 3 and 6 × 4 = 24. Then 22 − 3 + 24 = 43.