Which two signs should be interchanged to make the below equation mathematically correct?
104 13 + 78 - 3 2 = 143
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. ÷ and −.
104 13 + 78 - 3 2 = 143
After interchanging option 1 ÷ and −;
104 - 13 + 78 ÷ 3 × 2 = 143
104 - 13 + 52 = 143
156 - 13 = 143
143 = 143
Thus, no need to check further options.
Hence, the correct answer is ÷ and −.