Prime Numbers
Which one of these numbers is a prime number?
7 or 39
7?
Composite numbers have more than ______ factors.
two
What are the factors for 16?
1, 2, 4, 8, 16
What are the prime factors of 12?
3 x 2 x 2
What are the first 6 multiples of 5?
5, 10, 15, 20, 25, 30
This prime number is a factor of 4
2
When you add this composite number to the prime number 7 you get a prime number, 13
6
1,3,5,7
What are the prime factors of 28?
7 x 2 x 2
What are the first 7 multiples of 7?
7, 14, 21, 28, 35, 42, 49
Which number is a prime number?
13 or 21
13
Which one is a composite number?
41 or 39
41
Which numbers are factors of 28?
1, 2, 3, 4, 6, 7, 12, 14
1, 2, 4, 7, 14
What is the prime factorization of 36?
3 x 3 x 2 x 2
List the multiples of 6 that are between 20 and 70
24, 30, 36, 42, 48, 54, 60, 66
Which is a prime number? 8 or 7
7
When you square 5, you get this composite number.
25
Find all the factors for 42
1, 2, 3 6, 7, 14, 21, 42
What is the prime factorization of 56?
7 x 2 x 2 x 2
How many multiples of 8 are there below 100?
12
(8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96)
Which one of these numbers is a prime number?
31 or 81
31
When you cube 4, you get this composite number.
64
What are the factors for 64
1, 2, 4, 8, 16, 32, 64
What is the prime factorization of 72?
2 x 3 x 2 x 2 x 3
What is the Lowest Common Multiple of 9 and 12?
36