What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

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?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

What does below Rebus mean ?

esgg sgeg gegs gsge

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Solve the following series:
AZ, GT, MN, __, YB

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

How could a baby fall out of a twenty-story building onto the ground and live?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?