What does this below rebus puzzle mean?

How can a man go eight days without sleep?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

What is the below Rebus indicate?

Replace the question mark with the correct number in below Picture:

Can you find the 09 errors in the picture below?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

The more it dries, the wetter it becomes. Can you tell what it is?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?