I have thought of a number that is made up by using all the ten digits just once. Here are a few clues for you to guess my number:

First digits is divisible by 1.
First two digits are divisible by 2.
First three digits are divisible by 3.
First four digits are divisible by 4.
First five digits are divisible by 5.
First six digits are divisible by 6.
First seven digits are divisible by 7.
First eight digits are divisible by 8.
First nine digits are divisible by 9.
The number is divisible by 10.

Can you find out the number ?

What have one eye but still cannot see?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What can go up a chimney down, but can’t go down a chimney up?

It belongs to you, but other people use it more than you do. What is it?

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

In the picture given below, can you find out which digit will take place of the question mark?

What is the end of everything?

In the Wild West, you are challenged into a death match by two bounty hunters nicknamed Golden Revolver (GR) and Killer Boots (KB). You accept the challenge. None of you want to waste any of the bullet and so a certain rules are laid down:

1) All of you will shoot in a given order till the last man standing.
2) Each of you shoots only once upon his turn.
3) If any one of you is injured, the other two will finish him off with an iron rod.
4) The worst shooter of all (which is you) shoots first and the best one shoots at the last.

Now, how will you plan things if you know that you hit every third shot of yours, KB hits every second shot and GR hits every shot ?