What does this below rebus puzzle mean?

Why is the Hole below a Lock?

I have eight fingers and two thumbs but I do not live. What Am I?

Find out the missing number in the picture attached:

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

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

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

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?