If ‘+’ means ‘−’, ‘÷’ means ‘+’, ‘−’ means ‘×’, and ‘×’ means ‘÷’. Which of the following will be the value of the expression?
81 × 9 + 21 − 7 ÷ 147
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 9.
Given equation: 81 × 9 + 21 − 7 ÷ 147
Given directions: ‘+’ means ‘−’, ‘÷’ means ‘+’, ‘−’ means ‘×’, and ‘×’ means ‘÷’
After interchanging the expression becomes:
= 81 ÷ 9 - 21 × 7 + 147
= 9 - 21 × 7 + 147
= 9 - 147 + 147
= 9
Hence, 9 is the correct answer.