<p>Created by Mr. Lord.</p><p>The "Rule of 72" is a rule of thumb that can help you compute when your money will double at a given interest rate. </p><p>To use this simple rule, you just divide the annual interest into 72. For example, if you get 6% on an investment and that rate stays constant, your money will double in 72 / 6 = 12 years. </p><p>Of course you can also compute an interest rate if you are told that your money will double in a given number of years. For example, if your money has to double in two years so that you can buy your significant other that Mazda Miata, you'll need 72 / 2 = 36% rate of return on your stash.</p><p>1. How long would it take to double an investment of $6,000 at 8%. </p><p>2. How much would an investment of $6,000 at 8% be worth after 36 years (when you are around 55 and ready to retire early)?</p><p>3. Are ownership investments higher or lower risk? Give an example</p><p>4. If unlucky Jane invested $5,000 in a lending investment at a guaranteed rate of return of 4% how long would it take to double her money?</p><p>5. Because unlucky Bob did not start investing early enough he needs to get higher returns on his investments. If he wanted to turn his $5,000 into $10,000 in five years what rate does he need to get on his investment? </p><p>6. How long would it take for an investment to double if the rate of return was 15%?</p><p>7. What rate of return do we need to make our investments double every 3 years?</p><p>8. If an investment returns a rate of 24%, how much would a $5,000 investment be worth after 30 years.</p><p>9. If an investment returns a rate of 14.4%, how much would a $25,000 investment be worth after 25 years?</p><p>10. How much would a $20,000 investment be worth after 30 years with an average 14.4% return. Created by Mr. Lord.</p>