**Rule of 72**: Divide 72 by the rate of return. The resultant answer is the number of years it takes for your money to double. So for 18% returns, it takes 4 years for your money to double (72/18).

**Rule of 69**: This is the more accurate version of the above rule. Divide 69 by the rate of return and then add 0.35 to it. So for 18% returns, it takes 4.18 years for the money to double (69/18+0.35).

**Rule of 114**: This rule tells how long it takes your money to triple. Divide 114 by the rate of return. So for 18% returns, it takes 6.33 years for your money to triple (114/18).

**Rule of 144**: This rule tells you that how long it takes for your money to quadruple (i.e.) become 4 times. So for 18% returns, it takes 8 years for your money to quadruple (144/18).

**What 18% does to an investment? It makes it 5 times in 10 years, 27 times in 20 years and 143 times in 30 years.**

**The most important thumb rule of all is to remember the power of time and that compounding is back loaded.**

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