A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

What has no start, end, or centre?

Find the next number in the sequence

5 12 24 36 ?

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?

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

Can you find out the number that should replace the question mark with a valid reason?

Why do Chinese men eat more rice than Japanese men do ?

81 x 9 = 801. What must you do to make the this equation true?