If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Why is Saturday stronger than Monday?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

10+10 and 11+11 can give you the same answer.

Explain how?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?