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Compound Merge
Slide and merge money tiles to build the goal amount. Every merge is a doubling, and the rule of 72 shows how many years that takes in real life.
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Frequently asked questions
What is the rule of 72?
A quick way to estimate how long money takes to double: divide 72 by the annual interest rate. At 8% a year it takes about 9 years, and at 12% about 6 years.
Why does compounding matter?
With compounding, your gains earn gains of their own, so growth speeds up over time. That is why starting early and a slightly higher rate make such a large difference over decades.
How does the game connect to real money?
Each merge is one doubling. The panel converts your best tile into real years at the day's interest rate, so you can see what a rate difference costs in time.
Is this financial advice?
No. It is an illustrative learning game, and the rule of 72 is an approximation.