What is the next number in this series?

4,12,84,3612....

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

who is silent in the parliament?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

O_er_t_o_

Complete the missing letters of the given word.

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?