Select the number that will come in the place of the question mark(?), if ‘+’ and ‘ – ‘ are interchanged and ‘×’ and ‘÷’ are interchanged?
13 ÷ 145 × 29 – 69 + 13 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 121.
Given expression: 13 ÷ 145 × 29 – 69 + 13 = ?
If ‘+’ and ‘ – ‘ are interchanged and ‘×’ and ‘÷’ are interchanged, then
13 × 145 ÷ 29 + 69 – 13 = ?
= 13 × 5 + 69 – 13
= 65 + 69 – 13
= 134 – 13
= 121