What can you see in the middle of March and April that you can never see in any other month?

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?

What is red and smells like blue paint?

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

Who is He ?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

Which Travels Faster? Solve below famous picture riddle:

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

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

Which alphabet is a part of our body?