why number 8549176320 is one of a kind?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

Move three sticks of the spiral below to form a square.

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

Imagine you are in a room with no windows or doors. How will you get out?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

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

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?