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

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

I shave every day, but my beard stays the same. What am I?

People make me, save me, change me, raise me. What am I?

Can you solve below mathematical equation?

2^1234 - 2^1233

Who always enjoys poor health?

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?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

What has a ring but no finger?