What goes up but never comes down?

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

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Guess the hidden movie name?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

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

If eleven plus two equals one, what does nine plus five equal?

A fresher was sitting in an interview. The interviewer said, "This is the last question of your interview. Tell me the accurate position of the centre of this table where your resume is kept."

How can he answer this question? What will you have answered to such a question?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?