Question : Directions: What will come in the place of the question mark (?) in the following equation, if + and × are interchanged and – and ÷ are interchanged?
105 – 15 ÷ 13 + 3 × 27 = ?
Option 1: 58
Option 2: –5
Option 3: 16
Option 4: 23
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Correct Answer: –5
Solution :
Given:
105 – 15 ÷ 13 + 3 × 27 = ?
After interchanging the signs as per the instructions, the equation becomes –
= 105 ÷ 15 – 13 × 3 + 27
= 7 – 13 × 3 + 27
= 7 – 39 + 27
= – 5
So, – 5 is the answer to the given equation. Hence, the second option is correct.
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