I look at you, you look at me, I raise my right, you raise your left. What am I?

What is the next number in this series?

4,12,84,3612....

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

I can write cow in 13 letters.

Can You?

Guess the hidden movie name?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

By what process could you make a 'Tea-Table' into food?

When 99 is considered higher than 100?