What does this simple rebus mean?

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

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?