Can you count the number of matches in the picture below ?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

What brings you down but never up?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

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

What Am I?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?