Can you count the number of lines in the below picture?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

What can you catch but never throw?

What goes up but never comes down?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

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

No matter how little or how much you use me, you change me every month. What am I?

What am I?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

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?