Which two numbers should be interchanged to make the given equation correct?
7 × 4− 8 × 2 + 3 × 14 × 5− 9 = 133
(Note: Interchange should be done of entire number and not individual digits of a given number)
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 14 and 9.
Given equation: 7 × 4− 8 × 2 + 3 × 14 × 5− 9 = 133
On interchanging the two numbers:
7 × 4− 8 × 2 + 3 × 9 × 5− 14 = 133
28 - 16 + 135 - 14 = 133
163 - 30 = 133
133 = 133