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

Spot 5 differences in two Christmas tree below:

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

What is the end of everything?

What is more useful when it is broken?

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?