What do you get if you add 2 to 100 four times?

Which flower has two lips?

What seven-letter word has hundreds of letters in it?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

What always comes into a house through the keyhole?

Can you name an animal whose killing cannot be performed without spilling your own blood?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

I can write cow in 13 letters.

Can You?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?