Solution:

Colors:
Y B R G
G R B Y
B Y G R
R G Y B


Signs:
x + - /
- / x +
/ - + x
+ x / -

Solution:

8

Explanation:
If you look carefully then you will see that five matches lay ahead of the lighter and five are visible in the reflection of the lighter. Out of those five, we can see three matches emerging away from the surface of the lighter but two remains just as a part of reflection. Thus the total number of matches are eight.

Solution:

Arc + tick + circle.
= Artic Circle

Solution:

Hand Ball

Solution:

B

sideways clockwise 1/4 turn

Solution:

Its a paradox

=> A sentence that always contradicts itself and yet might be true.

Solution:

Just In case

Solution:

Overall or AboveAll

Solution:

half hearted

Solution:

Space Invaders