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?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?