Replace the question mark with the correct number.

Can you solve the below rebus?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

What can you see in the middle of March and April that you can never see in any other month?