You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

Name a key which is hardest to turn.

How many Watermelons are there in the below picture?

A few friends are enjoying their sea voyage in a boat full of apples. On the way, they felt hungry and thus decided to eat the apples. Together, they ate two dozen of apples. When they have eaten the apples, will there be any change in the water level?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

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

What can you hold in your right hand, but never in your left hand?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title