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.

What is the end of everything?

Can you count the number of triangles in the given figure?

How many letters are in the alphabet?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E