How can you drop a raw egg from a height onto a concrete floor without cracking it?

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.

Why do people go to bed?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

What does this rebus riddle mean?

Why is it very easy to weigh a fish?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What is Luis Suarez's (Soccer Player) favorite tea?

What always comes into a house through the keyhole?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.