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?

When is the top of a mountain similar to a savings account?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

Which is faster, Heat or Cold ? Explain.

Can you count the number of lines in the below picture?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?