I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

What happened when the wheel was invented?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

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.

Which digit occurred maximum times between the number 1 and 1000?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

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.

You need to remove two matchsticks to make the below equation true. Can you do it ?