Which two numbers, from among the given options, should be interchanged to make the given equation correct?
(6)2 - 20 + (28 ÷ 7) - [(√4) × 8] + (2)2 = 40
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 6 and 8.
Given equation: (6)2 - 20 + (28 ÷ 7) - [(√4) × 8] + (2)2 = 40
Option 1: 6 and 8
After interchanging the expression becomes:
(8)2 - 20 + (28 ÷ 7) - [(√4) × 6] + (2)2 = 40
64 - 20 + 4 - 12 + 4 = 40
64 - 20 + 4 - 8 = 40
40 = 40