Which two numbers should be interchanged to make the given equation correct?
(86 ÷ 43) + (66 ÷ 33) × 2 + 72 – 6 × 4 = 177
(NOTE: Numbers must be interchanged and not the constituent digits e.g. if 2 and 3 are to be interchanged in the equation 43 × 3 + 4 ÷ 2, then interchanged equation is 43 × 2 + 4 ÷ 3)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 43 and 2.
Given equation: (86 ÷ 43) + (66 ÷ 33) × 2 + 72 – 6 × 4 = 177
Option 1) 43 and 2
On interchanging the numbers;
(86 ÷ 2) + (66 ÷ 33) × 43 + 72 – 6 × 4 = 177
43 + 86 + 72 - 24 = 177
201 - 24 = 177
177 = 177