What does this rebus riddle means ?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Why is a river so rich ?

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 hands, but can’t clap?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

John was piloting a plane behind a car but was never able to overtake it. Why?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"