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?

Can you solve the below algebraic mathematical equation?

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

Name a key which is hardest to turn.

Why do you find that most of the buildings are deprived of the 13th floor?

There are forty elephants and they have forty-fore heads. How can this be possible?

Which alphabet letter is a question?

Why is the longest human nose just 11 inches?

Which part of London exists in France as well ?

What begins with T, ends with T, and has T in it?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.