Which two numbers (not digits) should be interchanged to make the given equation correct?
48 ÷ 3 + 12 × 4 – 6 × 7 + 21 = 27
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 3 and 4.
Given equation: 48 ÷ 3 + 12 × 4 – 6 × 7 + 21 = 27
Option 1) 3 and 4
After interchanging the numbers we get:
48 ÷ 4 + 12 × 3 – 6 × 7 + 21 = 27
12 + 12 × 3 – 6 × 7 + 21 = 27
12 + 36 – 42 + 21 = 27
69 – 42 = 27
27 = 27