Move four matchsticks to the below square to form three squares?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Can you solve this picture maths equation?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Our product and our sum always give the same answer. Who are we?

John was piloting a plane behind a car but was never able to overtake it. Why?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

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?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?