A billionaire offers to give you $3.7 billion if
you will count out the amount in $1 bills or
a lump sum of $7000. Assume that you can
count at an average rate of one bill per second,
and be sure to allow for the fact that you need
about 10 hours a day for sleeping and eating.
Which offer should you accept?
In order to answer this, how long will it
take you to count out the $3.7 billion?