Buy me, smell me or deliver me, I do not change.

Who am I?

Can you solve below mathematical equation?

2^1234 - 2^1233

The answer I give is yes, but what I mean is no. What was the question?

What makes this number unique: 8,549,176,320?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.