Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What have one eye but still cannot see?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

What jumps when it walks and sits when it stands?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

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

John was piloting a plane behind a car but was never able to overtake it. Why?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

What demands an answer, but asks no questions