You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

O_er_t_o_

Complete the missing letters of the given word.

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

What is the centre of gravity?

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 ?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?