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

What is the centre of gravity?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

Spot 5 differences in two Christmas tree below:

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

What breaks yet never falls, and what falls yet never breaks?

You walk into an old horror house. It has no power or plumbing. Once inside, you see three doors. Each door has a number on it. Behind each door is a way for you to die. Behind door number one, you die by getting eaten by a lion. Behind door number two, you die by getting murdered. Behind door number three, you die by an electric chair. You can’t turn back, so you have to go through a door. Which door do you go through?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?