Prime numbers
10 is composite. What factors of 10 are prime?
2 and 5
12 is composite. What are the factors of 12?
1, 2, 3, 4, 6 and 12
Which two numbers are prime?
5, 7, 10, 15
5, 7
Is 7 prime or composite?
prime
What is a factor?
a number that you multiply with another number to get a product
14 is composite. What factors of 14 are prime?
2 and 7
24 is composite. What are the factors of 24?
1, 2, 3, 4, 6, 8, 12, 24
Which 2 numbers are composite?
2, 9, 37, 75
9, 75
Is 38 prime or composite?
Composite
What is a prime number?
a whole number greater than 1 that has exactly two factors, 1 and itself
24 is a composite. What factors of 24 are prime?
2 and 3
30 is composite. What are the factors of 30?
1, 2, 3, 5, 6, 10, 15 and 30
Which 2 numbers are prime?
14, 17, 19, 93
17, 19
Is 71 prime or composite?
prime
What is a composite number?
a whole number greater than 1 that has more than two factors
51 is composite. What factors of 51 are prime?
3 and 17
48 is composite. What are the factors of 48?
1, 2, 3, 4, 6, 8, 12, 16, 24, 48
Which two numbers are composite?
23, 29, 39, 57
39, 57
Is 28 prime or composite?
composite
True or False?
61, 67, and 74 are all composite numbers
FALSE
Jayden was told to list all prime numbers between 30 and 50. Jayden's list is shown.
31, 37, 41, 47
The prime number missing from Jayden's list is ___.
What is 43?
50 is composite. What are the factors of 50 that are also composite?
10, 25, 50
Which two numbers are prime?
21, 31, 41, 51
31, 41
Brenda said the number 2 is prime because it has only two factors. Carla said that the number 2 is composite because it is an even number, and all even numbers are composite.
_________ is correct. Why?
Brenda
True or False?
The number 51 is prime. Explain your answer.
FALSE, it is composite because 17 x 3 = 51