What will come in the place of the question mark (?) in the following equation, if ‘+’ and ‘-’ are interchanged and ‘×’ and ‘÷’ are interchanged?
98 ÷ 7 + 288 × 2 - 144 × 3 - 152 ÷ 2 + 120 = ?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 774.
Given equation: 98 ÷ 7 + 288 × 2 - 144 × 3 - 152 ÷ 2 + 120 = ?
After interchanging signs:
98 × 7 - (288 ÷ 2) + (144 ÷ 3) + 152 × 2 - 120 = ?
= (98 × 7) - 144 + 48 + (152 × 2) - 120
= 686 - 144 + 48 + 304 - 120
= 1038 - 264
= 774