Why is the Hole below a Lock?

Find out the missing number in the picture attached:

What does the rebus below mean?

TEN BADTION

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

You are trapped into a death trap by the famous jigsaw killer. As usual, a screen flashes in front of you and explains you the trap game. There are 100 pearls kept in a bowl in front of you and an empty bowl. Among the 100 pearls, 50 are white and 50 are black. You can divide them as you like into the two bowls. Once you are done, you will pull a lever, which will turn the room pitch black. The bowls will move and shuffle around. In the dark, you have to pick up one pearl from any bowl. Once you do that, the room will flood with lights again. If the peral you have in your hand is white, you will be allowed to live, but if the pearl you picked is black, the room will be filled with poisonous gas and you will die. How will divide the pearls to increase your chances of survival?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?