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• Rule of 72 - Wikipedia, the free encyclopedia

  In finance, the rule of 72, the rule of 71, the rule of 70 and the rule of 69.3 are methods for estimating an investment 's doubling time or halving time.

• The Rule of 72 (with calculator)

  Rule of 72. Have you always wanted to be able to do compound interest problems in your head? Probably not, unless you're a sociopath, but it's a very useful skill to have because ...

• The Rule of 72 | BetterExplained

  The Rule of 72. The Rule of 72 is a great mental math shortcut to estimate the effect of any growth rate, from quick financial calculations to population estimates.