What is the word or phrase?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

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

Can you find out which options fits best with the missing column?

How many triangles are there on the puzzle below?

When does a USA Potato change its nationality?

A dying old man wants to divide his entire land between his only two sons. Since his only wish is to treat them as equal as both of them have been too good to him, he wants to divide his land equally between them. The problem is that the land is significantly irregular in shape and thus there is no choice of cutting them into two equal halves.

Can you help him divide the land in a manner that both of his sons will be happy?