By interchanging the given two numbers (not digits) which of the following equation will NOT be correct? 3 and 7
I. 7 × 9 + 3 - 8 ÷ 2 = 30
II. 2 × 3 + 7 - 4 ÷ 1 = 13
Show answer & explanation
Correct answer: D
Explanation
I. 7×9+3−8÷2=30
Interchanging the numbers 3 and 7
3×9+7−8÷2
27+7−4=30
30 = 30
II. 2×3+7−4÷1=13
Interchanging the numbers 3 and 7
2×7+3−4÷1
2×7+3−4
14+3−4=13
17 - 4 = 13
13 = 13
Conclusion
Both equations are correct
Correct answer: 4) Neither I nor II