What is both possible and impossible at the same time?

There is a place where if I stand up straight, I will still be considered sideways.

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

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?

All Marigolds are flowers.
Few Flowers are used to make colors.
Therefore, some Marigold are used to make colors.

True Or False?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

What does this mathematical rebus means ?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What am I?

What has many teeth, but cannot bite?