Question : Directions: What will come in the place of the question mark (?) in the following equation if + and – are interchanged and × and ÷ are interchanged?
214 – 65 × 5 ÷ 7 + 21 = ?
Option 1: 255
Option 2: 269
Option 3: 279
Option 4: 284
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Correct Answer: 284
Solution :
Given:
214 – 65 × 5 ÷ 7 + 21 = ?
After interchanging + with –, and × with ÷, the equation will be as follows –
= 214 + 65 ÷ 5 × 7 – 21
= 214 + 13 × 7 – 21
= 214 + 91 – 21
= 305 – 21
= 284
So, 284 is the required answer to the given equation. Hence, the fourth option is correct.
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