What is the next number in this series?

4,12,84,3612....

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

How can you make a TV, a bed, a dog, and a car liquid?

Can you solve below mathematical equation?

2^1234 - 2^1233

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Before Mount Everest was discovered, what was the highest mountain in the world?

Christina makes tasty toast in a small pan. After toasting one side of a slice, she turns it over. Each side takes 30 seconds. The pan can only hold two slices.
How can she toast both sides of three slices in 1 & 1/2 instead of 2 minutes?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?