Question : Directions: What will come in the place of ? in the following equation, if + and – are interchanged and × and ÷ are interchanged?
16 ÷ 4 + 15 × 5 – 47 = ?
Option 1: 118
Option 2: 128
Option 3: 138
Option 4: 108
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Correct Answer: 108
Solution :
Given:
16 ÷ 4 + 15 × 5 – 47 = ?
After interchanging + with –, and × with ÷, the equation will be as follows –
= 16 × 4 – 15 ÷ 5 + 47
= 16 × 4 – 3 + 47
= 64 – 3 + 47
= 111 – 3
= 108
So, 108 is the required answer to the given equation. Hence, the fourth option is correct.
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