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Rule of 72: divide 72 by an annual growth rate to estimate how many years it takes to double. At 8%, about 9 years.
Money facts stick better when they're surprising. This calendar mixes the useful (the Rule of 72, emergency funds, unit prices) with the odd (Hungary's 1946 hyperinflation, the 100-trillion-dollar note).
It's general information, not financial advice. Teens learning about money and parents trying to start money conversations both get something from it.
One tap adds it to Apple Calendar, Google or Outlook. It updates itself and you can remove it any time.
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