Start with a penny

This was a $100,000 question from ABC’s Super Millionaire tonight:

If you start with a penny and you double it every day, how long will it take before you have one million dollars?

A. 27 days
B. 74 days
C. 157 days
D. 293 days

Answer below the fold…

The answer is A. 27 days

Here is the math:

Day 0 – $0.01
$0.02
$0.04
$0.08
$0.16
$0.32
$0.64
$1.28
$2.56
$5.12
$10.24
$20.48
$40.96
$81.92
$163.84
$327.68
$655.36
$1,310.72
$2,621.44
$5,242.88
$10,485.76
$20,971.52
$41,943.04
$83,886.08
$167,772.16
$335,544.32
$671,088.64
Day 27 – $1,342,177.28

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