Prime Detective
Select numbers with exactly two positive divisors.
Getting ready…
How to play
Select numbers with exactly two positive divisors.
About this activity
Prime Detective. Use factor reasoning to distinguish primes and composites. Three levels to explore at your own pace.
- What to practice
- Use factor reasoning to distinguish primes and composites.
- Controls
- Select every matching tile, then press Check. Select a tile again to remove it.
- Choosing a level
- Start with Easy. Medium and Hard extend the activity with more rounds, choices, or a larger challenge. You can change the level or restart at any time.
Big buttons and simple controls on phones, tablets, and computers.