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

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

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?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

What is more useful when it is broken?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

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

Who is He ?

The cream is heavier than Milk. True or False?

Find the value of "?" in the ball picture Riddle below:

When monkey rotate the gear, which mark will be hit 1 or 2 ?