What has no start, end, or centre?

What has a bottom at the top?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

It is always ahead of me yet I can never see it. What is it?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Next Number in the Series,

5, 16, 49, 104, ?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.