Why do Chinese men eat more rice than Japanese men do ?

When is the top of a mountain similar to a savings account?

Can you find the mistake in the below statement?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

Can you start the fire using two pieces of wood?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

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.

What is both possible and impossible at the same time?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?