What does this below rebus puzzle mean?

I don't get anymore wetter, no matter how much rain falls on me.

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

What goes up but never comes down?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

The dirtier I get, the whiter I look. Who am I?

In the image below, can you find the value of an angle(y)

Can you name some countries which do not have the alphabet 'A' in them?