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

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?

The centre of the third figure is empty. What digit should fit inside?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

What is more useful when it is broken?

There was a strange boy who was born before his father. How can this be possible?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?