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Investing  
What is Investing? Why Invest? Time Value of Money Rule of 72 Stock Market Bonds Mutual Funds Quiz 

Rule of 72If you want to know how long it will take to double your money, take the number 72 and divide that number by the interest rate you are getting. So if you deposit $3,000 into an account with a 2% interest rate, 72 ÷ 2 is 36. So in 36 years you will have $6,000.
If you have an interest rate of 12%, you will make $6,000 in six years. The higher the interest, the quicker it is.

