Can you replace the question mark with the correct number?

Identify the 10 differences between the two given pictures.

A shopkeeper allows people to buy a cold drink bottle in exchange for five empty bottles. A guy had a party at home and spent 77 cold drink bottles at the party. Now he has 77 empty bottles with him.

How many bottles do you think he can buy in exchange for those 77 empty bottles?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

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

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

what does the below rebus means?