They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I make two people out of one. 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 white when I am dirty, and black when I am clean. What am I?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

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?

I know a nine-letter word having only one vowel.
Do you ?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?