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 will you call your mother's brother's brother-in-law?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

What makes this number unique: 8,549,176,320?

What does below rebus means ?

It is always ahead of me yet I can never see it. What is it?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

What can go through glass without breaking it?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?