Why Aeroplane windows are round?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

John needs to purchase 100 chocolates from three different shops and he has exactly 100 rupees to do that which he must spend entirely. He must buy at least 1 Chocolate from each shop.

The first shop is selling each chocolate at 5 paise, the second is selling at 1 rupee and the third is selling at 5 rupees.

How many chocolates should he buy from each shop?

In the four images below, can you find the odd one out?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

What is the coolest letter in the alphabet?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Why are all black people so quick ?