What number when divided in half becomes zero?

Different lights make me strange by changing me into different sizes. What am I?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What does an Island and the letter T have in common?

What does below rebus means ?

By what process could you make a 'Tea-Table' into food?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

The answer I give is yes, but what I mean is no. What was the question?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?