I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What is more useful when it is broken?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What am I?

What can you hold in your right hand, but never in your left hand?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

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?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?