What will come in the place of the question mark (?) in the following equation, if '+' and ‘−' are interchanged and '×' and '÷' are interchanged?
20 − 80 × 16 ÷ 5 + 15 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 30.
Given series: 20 − 80 × 16 ÷ 5 + 15 = ?
On interchanging the signs:
20 + 80 ÷ 16 × 5 - 15 = ?
? = 20 + 25 - 15 = 45 - 15 = 30