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

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

What has a bottom at the top?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

What can you see in the middle of March and April that you can never see in any other month?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

Make a sentence consisting of three words that have the whole alphabet.

Why do people go to bed?

What 5-letter word typed in all capital letters can be read the same upside down?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?