Select the number that will come in the place of the question mark (?), if ‘+’ and ‘-‘ are interchanged and ‘×’ and ‘÷’ are interchanged?
121 × 11 - 28 ÷ 3 + 17 = ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 78.
Given equation: 121 × 11 - 28 ÷ 3 + 17 = ?
On interchanging the signs:
(121 ÷ 11) + 28 × 3 - 17 = ?
= 11 + (28 × 3) - 17
= (11 + 84) - 17
= 95 - 17 = 78