Which two numbers should be interchanged to make the given equation correct?
35 + (25 × 3 − 45) ÷ 2 + (15 × 4) = 125
(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 the interchanged equation is 43 × 2 + 4 ÷ 3)
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 35 and 45.
On interchanging numbers,
45 + (25 × 3 − 35) ÷ 2 + (15 × 4) = 125
45 + (75 - 35) ÷ 2 + 60 = 125
45 + (40 ÷ 2) + 60 = 125
45 + 20 + 60 = 125
125 = 125