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?

How many times can you subtract the number two from the number fifty?

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

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?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

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

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

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