11+advancedinterest-growth
The Rule of 72
Explore why rule of 72: divide 72 by the annual rate.
5
Lessons in this module
30 min module estimate
1Preview
What the Rule of 72 is
Explore why rule of 72: divide 72 by the annual rate.
8 minPreview lesson →
2Preview
Using it at 8%
Explore why 72÷8=9 years per doubling.
8 minPreview lesson →
3Preview
Using it at 12%
Explore why 72÷6=12 years at 6%.
8 minPreview lesson →
4Preview
Why time beats rate
Explore why time multiplies the compounding effect.
8 minPreview lesson →
5Preview
Using it on debt
Explore why before borrowing: 72÷rate=years to doubling.
8 minPreview lesson →
Full experience
Want the activities, rewards, and progress tracking?
Create a family bank to unlock the full curriculum, kid dashboards, DeeDee guidance, quizzes, badges, and parent progress insights.