During which month do people sleep the least?

How many sides does a circle have?

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?

How many times can you subtract the number two from the number fifty?

The more you take me, the more you leave me behind.
Who Am I?

The dirtier I get, the whiter I look. Who am I?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

What word begins and ends with an E, but has only one letter?

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