Two numbers that have the same magnitude but are opposite in signs are called Opposite Numbers.
When opposite numbers are added, it gives zero.
To get the opposite of a number, change the sign.
The absolute values of opposite numbers are the same.
The opposite numbers are equidistant from 0 on a number line
+ 25 and - 25 are the opposite numbers.
- 8 is the opposite number of + 8.

A. + 6, Figure 1
B. - 6, Figure 2
C. ± 6, Figure 3
D. None of the above
Step 1: Opposite of 6 is - 6. [To get the opposite, change the sign of the number.]
Step 2: Negative numbers will be to the left of 0 and positive numbers will be to the right of 0 on the number line.
Step 3: As - 6 is negative number, it will be 6 units to the left of 0 on the number line.
Step 4: So, figure 2 represents - 6.
Q1: What is the opposite of 7?
Q2: What is the opposite of -12?
Q: What is the opposite of 0?
A: The opposite of 0 is 0.
Q: How do you find the opposite of a number?
A: Change the sign of the number. If it's positive, make it negative, and vice versa.