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.

Where do you go to learn how to make ice cream?

What have one eye but still cannot see?

Two brothers were watching a horror film on video late one night. One brother dozed off and dreamed that he was being chased by the crazy man from the movie, who was trying to kill him. In the dream, he hid in a cupboard. There was no sound except his heart pounding, and he had no idea where his crazed captor was. He was terrified! At that moment, the video finished, and his brother put his hand on the shoulder of his sleeping sibling to wake him. The shock at that tense moment was enough that the sleeping brother suffered a massive heart attack and died instantly. True or false?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

You bought me for dinner but never eat me. What am I?

I have feet, but no legs. Which animal Am I?

How many times can you subtract the number two from the number fifty?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?