Practice
100 thousandEndless problems made on demand, each with an exactly computed answer. Every click is a new one.
Curated
8| # | Title | Difficulty | Source | Tags | |
|---|---|---|---|---|---|
| 661 | Nine coins, one heavyWeighings | Easy | Lemma | ||
| 662 | Twenty-seven coinsWeighings | Easy | Lemma | ||
| 663 | Eight ballsWeighings | Easy | Lemma | ||
| 665 | Weights in one panWeighings | Easy | Lemma | ||
| 20 | The heavier coinWeighing | Medium | Lemma | ||
| 664 | Weights on both pansWeighings | Medium | Classical | ||
| 666 | The counterfeit stackWeighings | Medium | Lemma | ||
| 67 | The twelve coinsWeighing | Deep | Lemma |