Question : Directions: What will come in the place of the question mark (?) in the following equation if + and – are interchanged and × and ÷ are interchanged?
143 – 28 × 4 ÷ 5 + 22 = ?
Option 1: 156
Option 2: 149
Option 3: 167
Option 4: 142
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Correct Answer: 156
Solution :
Given:
143 – 28 × 4 ÷ 5 + 22 = ?
When + and – are interchanged, and × and ÷ are interchanged, the equation will be as follows –
⇒ 143 + 28 ÷ 4 × 5 – 22
= 143 + 7 × 5 – 22
= 143 + 35 – 22
= 156
So, the R.H.S. of the given equation is 156. Hence, the first option is correct.
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