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

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

I make two people out of one. What am I?

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?

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

If six children and two dogs were under an umbrella, how come none of them got wet?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

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

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 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?