You have a piece of paper, 10cm by 10cm. Area = 100cm^2. For some reason, you need a square piece of paper with an area of 50cm^2. Using the paper you have, what's an easy way of getting the new square?

By marking the middle of each side and draw four straight lines. the new straight lines are valued sqroot (5^2 +5^2) or sqroot (50) therefore the by cutting across the lines , we get a square of 50 cm^2

I am one small little piece of paper, yet sometimes hold lots of value. I am all you need to get in to big events, but will cost you. I am an important part of travel. And if lost, you’re not coming. What am I ??

A man is running down a hallway with a piece of paper in his hands, the lights flicker and the man stops, turns around and goes home, why is this?

You use it everyday but let it rest at night. It has an identical twin beside it all the time. For some reason you always cover it up. It is not alive but it has have a soul. What is it?