Click on all the prime numbers. 🚀🔊
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Final Score: 0
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Prime Numbers have exactly 2 factors: 1 and themselves.
Composite Numbers have more than 2 factors.
1 is neither.
CCSS 4.OA.B.4 — Find all factor pairs for a whole number in the range 1–100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1–100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1–100 is prime or composite.
This game gives students fast, repeated practice deciding whether every number from 1–100 is prime or composite, with instant factor feedback on every miss.
Click every prime number between 1 and {max} before time runs out. There are {count} primes to find. Clicking a composite (non-prime) number shows a quick tip with its factors so you can learn why it doesn't count — no need to stop and click through anything.
Tip: pick Easy or Normal before you start — Normal has more numbers and less time per number, so score even higher!
🧪 Just want to learn the primes with no pressure? Check the Practice Mode box before you hit Start Game — no timer, no score, just clicking and learning.
🔀 Want a real challenge? Check Scrambled Mode — the numbers get shuffled around the grid instead of sitting in order, so you can't just guess by position!
👥 Playing with a friend? Check Two Player Mode — pass the device back and forth, take turns clicking, and see who scores higher!