What is the next number in this series?

4,12,84,3612....

Can you replace the question mark with the correct number?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

How far can you walk into the woods?

When can we add 2 to 11 and get 1 as the correct answer?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

Spot what is wrong here in below Picture?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

I am the fastest animal but cannot climb the tree. What am I?