There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

I’m tall when I’m young, and I’m short when I’m old. What am I?

What is always in front of you but can’t be seen?

Move three sticks of the spiral below to form a square.

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

Move four matchsticks to the below square to form three squares?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

If eleven plus two equals one, what does nine plus five equal?

What has to be broken before you can use it?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?