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MATH

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for 30 days on the 1st daY I GET A PENNY THAN ON IT DUOBLES EVERY DAY UNTIL DAY 30
HOW MUCH PENNIES DO I HAVE ON DAY30

  • MATH -

    just take a look at the number of pennies on day #n
    n #
    1 1
    2 2
    3 4
    4 8
    ...
    n 2^(n-1)

    so, on day 30 you have 2^29 pennies
    That's about $5.4 million. You could retire and spend the rest of your life counting them!

  • MATH -

    1000000000

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