What goes up but never comes down?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

There is something which is always coming but never arrives?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

Can you place six X (crosses) in below board without making three in a row in any way ?

Our product and our sum always give the same answer. Who are we?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA