What is the coolest letter in the alphabet?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Can you name some countries which do not have the alphabet 'A' in them?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

How many letters are in the alphabet?

Why Aeroplane windows are round?

You visit a home for specially-abled children on the occasion of Christmas where you meet with 50 children. You have a box of chocolates containing 50 chocolates exactly.

What if you were asked to one chocolate to each child in a manner that one chocolate still remains in the box? Is it possible?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

You need to arrange three 7 and mathematical symbols to form number 1?

What Adam and Eve do not have but the rest of the people have?