What always comes into a house through the keyhole?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

What happened when the wheel was invented?

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

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 "?".

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

What has no start, end, or centre?