Which two numbers (not digits) should be interchanged to make the given equation
correct?
27 × 3 – (7)2 + 19 + (69 ÷ 23) × 6 – 15 = 70
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 7 and 6.
27 × 3 – (7)2 + 19 + (69 ÷ 23) × 6 – 15 = 70
After interchanging numbers,
27 × 3 - (6)2 + 19 + (69 ÷ 23) × 7 - 15 = 70
81 - 36 + 19 + 3 × 7 - 15 = 70
100 - 36 + 21 - 15 = 70
121 - 51 = 70
70 = 70