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Which are prime and which are composite? 18, 22, 31
composite: 18, 22 prime: 31
Which are prime and which are composite? 17, 7, 24
Composite: 24 prime: 7, 17
Draw an array model to prove this number is prime or composite: 9
Composite: 1 x 9 3 x 3
Draw an array model to prove this number is prime or composite: 13
prime: 1 x 13
Determine the prime factorization of 21
3 x 7
Determine the prime factorization of 15
3 x 5
How many factors does a prime number have?
2
How many factors does a composite number have?
More than 2
What is the prime factorization of 28?
2 x 2 x 7
True or false: All even numbers are composite
True
True or false: all odd numbers are prime
false
What is the prime factorization of 72?
2 x 2 x 2 x 3 x 3
Is 19 prime or composite?
prime
is 45 prime or composite?
composite
