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

How can you write nineteen in a manner that if we take out one, it becomes twenty?

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

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

How many sides does a circle have?

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

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

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?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?