Question : Directions: What will come in the place of the question mark (?) in the following equation if + and – are interchanged and × and ÷ are interchanged?
13 ÷ 145 × 29 – 79 + 17 = ?
Option 1: 119
Option 2: 131
Option 3: 124
Option 4: 127
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Correct Answer: 127
Solution :
Given:
13 ÷ 145 × 29 – 79 + 17 = ?
After interchanging + and – and × and ÷, the new equation will be –
= 13 × 145 ÷ 29 + 79 – 17
= 13 × 5 + 79 – 17
= 65 + 79 – 17
= 144 – 17
= 127
So, the equation equals to 127. Hence the fourth option is correct.
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