Why Wine Glass Stem is so long?

Prove that twice of ten is the same as twice of eleven.

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

How many bananas can you eat if your stomach is empty?

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?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

A blonde put eyeliner on her head. Why?