Without using a calculator (using old fashioned pencil and paper) and without cheating (by looking in the internet or a book for the answer):
If you put one penny on the first square of a chessboard, two pennies on the second, four pennies on the third and so on (doubling the amount of pennies for each square), until the last square (64th square), what would the total amount of pennies be? What would the total dollar amount be?
Hint: You’d be richer than Bill Gates. In fact, you’d be the richest man ever in history.