Solution:

Ronaldo

Solution:

Sam : 2
Dean : 5
Castiel : 7

Age diff
7 - 2 = '5' is prime
7 - 5 = '2' is prime
5 - 2 = '3' is prime

Solution:

The man asked the king that he wanted to die of old age.

Solution:

The ball will take infinite bounces before it is stopped. As per the question it will keep on bouncing half way up every time it hits the ground. But gravity will play its part at certain point of time which will make it stop.

Solution:

The brain teaser can be solved as shown in the image below.

Solution:

7

Explanation:
8th is bald man head, check the video below.

Solution:

Pages 19, 20, 23, 37, 38, & 42 will also be missing

Solution:

Slumdog Millionare = Slum + Dog + Million + air

Solution:

41312432

Solution:

3/7

Explanation:
If a 31day month starts on a Friday, Saturday or Sunday it will have five Sunday, if not it will have 4 Sunday.

Solution:

Remove the same 2 matchsticks from each figure and move figure towards left 45 degrees, It forms the letters V W X Y.