What does this simple rebus mean?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

Kohli and Dhoni decided to have a paintball match.
Kohli told Dhoni, "Sir it is not right as you got thrice the paintballs I have".

Dhoni instantly gives Kohli 10 hit paintballs.
Kohli replied, "Sir, I believe you still have twice the paintballs than I have".

Dhoni gives "?" more paintballs to Kohli.
Kohli replied, "Sir it is even now, Let us have a match".

What is "?".

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

If you say my name, I will no longer exist. What am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

What kind of band never plays music?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

Solve the equation in the image by looking at the pattern closely.