Which two numbers should be interchanged to make the given equation correct?
71 + 32 × 2 - 63 ÷ 7 + [(81)1/4] × 3 - 22 = 113
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 3 and 7.
71 + 32 × 2 - 63 ÷ 7 + [(81)1/4] × 3 - 22 = 113
After interchanging numbers,
71 + 64 - 63 ÷ 3 + [(81)1/4] × 7 - 22 = 113
135 - 21 + 21 - 22 = 113
113 = 113