What has no start, end, or centre?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

Client Dempsey living in one of the East Coast states of the U.S. was talking to Landon Donovan, who was living in the West Coast state of the U.S.

Dempsey: What time is it?
Donovan: Wow, It is the same time here.

How is this possible?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Which is the smallest number that you can write using all the vowels exactly once?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

What does this mathematical rebus means ?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.