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

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?

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

If a wheel has 54 spokes, how many spaces are there between the spokes?

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?

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

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

The more of this there is, the less you see. What is it?

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

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