Why Aeroplane windows are round?

What kind of tree can you carry in your hand?

Can you make a six-letter word using the letters N, A and B ?

Why Wine Glass Stem is so long?

I look at you, you look at me, I raise my right, you raise your left. What am I?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

It is always ahead of me yet I can never see it. What is it?

What country can make you shiver?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?