Rich As A King Overconfidence Test
Answer the following questions with a range of numbers, not just a single figure. Enter the range (minimum and maximum) of numbers within which you are 90% certain the answer lies. For instance, if the question asks for a specific year, give a range of years between which the particular event occurred. If you have no idea of the answer to a question, then expand your range of possible answers in order to feel 90% confident that the true answer lies somewhere between your two guesses. On the other hand, if you think you can give a good educated guess, then choose a smaller range and still be 90% confident.
 
John F. Kennedy's age at his death
Year that the Statue of Liberty was dedicated in New York
Number of countries in the world (as of 2013)
Air distance, in miles, between Alaska and Spain
Number of bones in the human body
Average distance in miles from the earth to the moon
Average amount of vegetables an American eats in a year (in pounds)
Length of the Amazon River (in miles)
Year that Beethoven was born
Population of Iceland (in 2013)