How can a man go eight days without sleep?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

Imagine you are in a room with no windows or doors. How will you get out?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

What is the largest number you can write with just 3 digits?

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?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

How can you make a TV, a bed, a dog, and a car liquid?

Can you write down eight eights so that they add up to one thousand?