By interchanging the given two numbers (not digits) which of the following equation will NOT be correct?
4 and 9
I. 9 × 2 + 4 - 6 ÷ 3 = 14
II. 8 × 3 + 9 - 4 ÷ 3 = 25
Show answer & explanation
Correct answer: A
Explanation
I. 9 × 2 + 4 − 6 ÷ 3 = 14
Switching 4 and 9:
4 × 2 + 9 − 6 ÷ 3
8 + 9−2=15
There is 14 on the right side, so this is incorrect.
II. 8 × 3 + 9 − 4 ÷ 3 = 25
Switching 4 and 9:
8 × 3 + 4 − 9 ÷ 3
24 + 4−3=25
This equals 25, so this is correct.
Only I is incorrect.