Can you replace the question mark with the correct number?

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

Who always enjoys poor health?

When can we add 2 to 11 and get 1 as the correct answer?

Below rebus represent famous DiCaprio movie. Can you name it?

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

A bomb exploded in a room full of married couples and no one died. How?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?