Question : Directions: What will come in the place of the question mark (?) in the following equation if + and – are interchanged and × and ÷ are interchanged?
6 + 15 × 5 – 4 ÷ 3 = ?
Option 1: 12
Option 2: 21
Option 3: 18
Option 4: 15
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Correct Answer: 15
Solution :
Given:
+ and – are interchanged and × and ÷ are interchanged
6 + 15 × 5 – 4 ÷ 3 = ?
After interchanging the signs according to the question the equation becomes –
= 6 – 15 ÷ 5 + 4 × 3
= 6 – 3 + 4 × 3
= 3 + 12
= 15
So, 15 is the required answer to the given equation. Hence, the fourth option is correct.
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