How many sides does a circle have?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

How many letters are in the alphabet?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

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?

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

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?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

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

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?