The Fake Coin for iPhone
This puzzle is an old problem. You are given n coins, of which n-1 are genuine and one is fake. All genuine coins have the same weight and the fake coin has a different weight. The difference is only perceptible by using a balance. Find the fake coin and tell if it is lighter or heavier in m weighings as maximum.
| Category | Price | Seller | Device |
|---|---|---|---|
| Entertainment | Free | Fernando Canellas | iPhone, iPad, iPod |
The game has three levels:
n=3 coins, m=2 weighings
n=12 coins, m=3 weighings
n=39 coins, m=4 weighings
Reviews
Great idea, difficult to use
Blueglass282828
This is a classic very hard math problem and a good idea for an app. The UI it's very difficult however. I couldn't remember which color was lighter or heavier or how many taps for each. I also think the instructions are wrong on which direction the arrow points. Since the developer only has one app I'm guessing this is a first effort and for that it seems fine. But it would need to be easier to use to give to someone new to the problem.
