What is the next number in this series?

4,12,84,3612....

Below rebus represent famous DiCaprio movie. Can you name it?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

What do you answer even though it never asks you questions?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

What four weights can be used to balance from 1 to 30 pounds?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=