Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Why is the longest human nose just 11 inches?

Which country gets ill every time?

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?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

John was piloting a plane behind a car but was never able to overtake it. Why?

What is next number in the pattern below:

131 517 192 123 ?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?