Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Why is the Hole below a Lock?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

Which is heavier: a ton of bricks or a ton of feathers?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

What is the longest word in the dictionary?

I can be cracked, made, told, and played. What am I?

What does this rebus mean?

O
N
C
E
TIME