Question
If signs ‘+’ and ‘-‘ and numbers 4 and 8 interchange with each other, then which one of the following four equations would be correct?
A. 4 ÷ 8 - 12 = 18
B. 8 - 4 ÷ 12 = 8
C. 4 - 8 + 12 = 0
D. 8 ÷ 4 -12 = 24
Answer: C
Solution:
Given, 4 – 8 + 12 = 0
On interchanging signs ‘+’ and ‘-‘ and number 4 and 8 in option (c), we get
-> 8 + 4 – 12 = 0
-> 12 -12 = 0
-> 0 = 0