There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Which wheel of car does not rotate when you turn your car right?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Can you find the hidden animal in the picture below?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

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.