Question : Directions: What will come in place of the question mark (?) in the following equation if + and ÷ are interchanged and – and × are interchanged?
25 × 6 – 4 ÷ 18 + 9 = ?
Option 1: 7
Option 2: 10
Option 3: 3
Option 4: 5
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Correct Answer: 3
Solution :
Given:
25 × 6 – 4 ÷ 18 + 9 = ?
On interchanging the mathematical signs as instructed, the equation becomes –
= 25 – 6 × 4 + 18 ÷ 9
= 25 – 6 × 4 + 2
= 27 – 24
= 3
So, 3 is the required answer for the given equation. Hence, the third option is correct.
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