Question : Directions: What will come in place of the question mark (?) in the following equation if + and – are interchanged and × and ÷ are interchanged
84 × 7 – 21 ÷ 4 + 29 = (?)
Option 1: 55
Option 2: 67
Option 3: 59
Option 4: 79
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Correct Answer: 67
Solution :
Given:
84 × 7 – 21 ÷ 4 + 29 =?
+ and – are interchanged and × and ÷ are interchanged
After substituting the signs as directed, the equation becomes —
⇒ 84 ÷ 7 + 21 × 4 – 29
= 12 + 21 × 4 – 29
= 12 + 84 – 29
= 67
So, the R.H.S. of the given equation is 67. Hence, the second option is correct.
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