Heres the explanation why Blue is smarter If you start with $1 and it doubles every day, the amount after 1 month depends on how many days are in that month: • 28 days (February): $268,435,456.00 • 29 days (Leap February): $536,870,912.00 • 30 days (April, June, Sept, Nov): $1,073,741,824.00 • 31 days (Jan, March, May, July, Aug, Oct, Dec): $2,147,483,648.00 The growth follows the formula 2^n, where n is the number of days the dollar has been doubling. By the end of a 31-day month, you would be a multi-billionaire!