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

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

I’m orange, I wear a green hat and I sound like a parrot. What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. 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?

What demands an answer, but asks no questions

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

How many letters are in the alphabet?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Which point will the car reach to go out?