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## Prime- Composite Numbers & MathLine

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**Prime/Composite Numbers**Prime-Composite Numbers & MathLine**Prime/Composite Numbers**Definition of Prime Numbers: All natural numbers greater than 1 divisible by only 1 & itself. Definition of Composite Numbers: All natural numbers greater than 1 divisible by more than 1 & itself.**Prime/Composite Numbers**Is 17 a prime or composite number?**Prime/Composite Numbers**Try to find factors of 17**Prime/Composite Numbers**Is 2 a factor?**Prime/Composite Numbers**Is 2 a factor?**Prime/Composite Numbers**Is 2 a factor?**Prime/Composite Numbers**Is 2 a factor?**Prime/Composite Numbers**Is 2 a factor?**Prime/Composite Numbers**Is 2 a factor?**Prime/Composite Numbers**Is 2 a factor?**Prime/Composite Numbers**Is 2 a factor?**Prime/Composite Numbers**Is 2 a factor? No! 2 2 2 2 2 2 2 2 1**Prime/Composite Numbers**Is 3 a factor?**Prime/Composite Numbers**Is 3 a factor?**Prime/Composite Numbers**Is 3 a factor?**Prime/Composite Numbers**Is 3 a factor?**Prime/Composite Numbers**Is 3 a factor?**Prime/Composite Numbers**Is 3 a factor? No! 3 3 3 3 3 2**Prime/Composite Numbers**Is 4 a factor?**Prime/Composite Numbers**Is 4 a factor?**Prime/Composite Numbers**Is 4 a factor?**Prime/Composite Numbers**Is 4 a factor? No! 4 4 4 4 1**Prime/Composite Numbers**Is 5 a factor?**Prime/Composite Numbers**Is 5 a factor?**Prime/Composite Numbers**Is 5 a factor? No! 5 5 5 2**Prime/Composite Numbers**Is 6 a factor?**Prime/Composite Numbers**Is 6 a factor?**Prime/Composite Numbers**Is 6 a factor? No! 6 5 6**Prime/Composite Numbers**Is 7 a factor?**Prime/Composite Numbers**Is 7 a factor?**Prime/Composite Numbers**Is 7 a factor? No! 7 3 7**Prime/Composite Numbers**Is 8 a factor?**Prime/Composite Numbers**Is 8 a factor?**Prime/Composite Numbers**Is 8 a factor? No! 8 1 8**Prime/Composite Numbers**Is 9 a factor? No! 9 8**Prime/Composite Numbers**Is 10 a factor? No! 10 7**Prime/Composite Numbers**Is 11 a factor? No! 11 6**Prime/Composite Numbers**Is 12 a factor? No! 12 5**Prime/Composite Numbers**Is 13 a factor? No! 13 4**Prime/Composite Numbers**Is 14 a factor? No! 14 3**Prime/Composite Numbers**Is 15 a factor? No! 15 2**Prime/Composite Numbers**Is 16 a factor? No! 16 1**Prime/Composite Numbers**Through trial and error students determine if a number is prime or composite. If they try every possible factor for 17, the student will see that 17 is prime.**Prime/Composite Numbers**So 17 is a Prime Number.**Prime/Composite Numbers**MathLine answers “WHY?” “Why is 17 Prime?” On MathLine we can see why, that’s what makes it powerful.**Prime/Composite Numbers**Is 24 a prime or composite number?**Prime/Composite Numbers**• Is 2 a factor?**Prime/Composite Numbers**• Is 2 a factor?**Prime/Composite Numbers**• Is 2 a factor?