If you say my name, I will no longer exist. What am I?

Can you solve the below geography rebus by decoding the below rebus ?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

Using eight eights and addition only, can you make 1000?

Take one out and scratch my head, I am now black but once was red. What am I?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.