If you say my name, I will no longer exist. What am I?

Which point will the car reach to go out?

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?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

Which is the correct shadow of the bird?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

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

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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