Prime & Composite Numbers
📋 What it is
A prime has exactly two factors (1 and itself); a composite has more.
🗣️ Coach says
Primes are the atoms of numbers — they can't be split into smaller factor pairs. 7 is prime (only 1 × 7). 12 is composite (many factor pairs). Every whole number is built from primes.
🧠 Memory hook
Prime = exactly 2 factors (1 and itself). Composite = more than 2. (1 is neither — a special case.)
😂 Giggle
Why is the number 9 like a peacock?
Because when you flip it, it's still a 6 — talk about showing off!
😲 Whoa!
The largest known prime number has over 41 million digits — printing it would fill thousands of books.
✅ Quick check: Is 7 prime or composite?
Say your answer out loud first — then reveal.
Prime — its only factors are 1 and 7.
A prime number has exactly two distinct factors: 1 and itself.
🪄 Trick question: Is the number 1 prime?
Careful — think it through, then reveal.
No — it has only ONE factor (itself), so it's neither prime nor composite.
A prime needs exactly two distinct factors; 1 has only one.
🧪 Try it! (2 minutes)
Test 2–10 for prime by trying to split each into factor pairs. The unsplittable ones are prime.