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Money · Ages 10+ · Set B
The rule of 72
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Goal: 15 min
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Remember: Seventy-two divided by the yearly rate is a quick guess at the years to double.

Questions

1
Seventy-two divided by the rate is about the years to double. Which garden doubles in about eight years?
🐕a garden paying six percent🦌a garden paying nine percent🐆a garden paying twelve percent
2
🚀Seventy-two divided by the rate is about the years to double. Does a garden paying twenty-four percent double in about four years?
YesNo
3
Which one is not true about the rule of seventy-two?
💭a tool for thinking≈an approximation🔭just as good at any rate
4
Which one is true about the rule of seventy-two?
💭a tool for thinking📏exact every single time🤞a promise about a real garden
5
Which one is not true about the rule of seventy-two?
🎯a close guess at doubling time🧮counting every year by hand💭a tool for thinking
6
Seventy-two divided by the rate is about the years to double. Which garden doubles in about eighteen years?
🦎a garden paying four percent🐢a garden paying three percent🐕a garden paying six percent
7
Which one is true about the rule of seventy-two?
🔭just as good at any rate📏exact every single time🎯a close guess at doubling time
8
Seventy-two divided by the rate is about the years to double. Which garden doubles in about twelve years?
🚀a garden paying twenty-four percent🐎a garden paying eight percent🐕a garden paying six percent
9
≈Is an approximation true of the rule of seventy-two?
YesNo
10
🐢Seventy-two divided by the rate is about the years to double. Does a garden paying three percent double in about nine years?
YesNo
11
Which one is true about the rule of seventy-two?
📏exact every single time🧮counting every year by hand➗seventy-two splitting evenly many ways
12
🐆Seventy-two divided by the rate is about the years to double. Does a garden paying twelve percent double in about four years?
YesNo
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