What work can one never finish?

You Are Highly Attentive If You Can Spot A Hat In This Bathroom In 9 Seconds!

Why is a river so rich ?

What do you think with the below Picture ?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

Decipher

yyyy u r, yyyyy u b, i c u r y+y 4 ? by sharks. How would you survive?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Can it be possible to build a house that has all its four walls facing towards the South?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?