What is the next number in this series?

4,12,84,3612....

Replace the question mark with the correct number in below Picture:

What makes this number unique: 8,549,176,320?

O_er_t_o_

Complete the missing letters of the given word.

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What country can make you shiver?

There are five people. One of them shot and killed one of the other five.
We know following clues:
1. Dan ran in the NY City Marathon yesterday with one of the innocent men.
2. Mike consider being a farmer before he moved to the city.
3. Jeff is a top notch computer consultant and wants to install Ben new computer next week.
4. The murderer had his leg amputated last month.
5. Ben met Jack for the first time six months ago.
6. Jack has been in seclusion since the crime.
7. Dan used to drink heavily.
8. Ben and Jeff built their last computers together.
9. The murderer is Jack's brother. They grew up together in Seattle.

Consider yourself to be a famous detective "Sherlock Homles", Can you find the killer?

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

On a beautiful Sunday morning, You ordered a hot tea to your hotel room and suddenly you remember an important thing that needed to be done right now will take around 3 minutes to complete.
Like most people you like your tea to be hot while drinking so, when should you pour cream in the tea?
1. straight away
2. Just people, you drink the team
3. Its does not matter

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?