What will come in the place of the question mark (?) in the following equation, if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged?
5 ÷ 4 − 3 × 1 + 2 = ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 21.
Given equation: 5 ÷ 4 − 3 × 1 + 2 = ?
If ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged, then
= 5 × 4 + 3 ÷ 1 - 2
= 5 × 4 + 3 - 2
= 20 + 3 - 2
= 23 - 2
= 21