Prime Factorization, GCF, LCM

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Find the prime number.

• 10
• 9
• 7
• 4

Which list is only composite numbers?

• 1, 3, 4
• 2, 4, 6
• 4, 6, 8
• 5, 6, 8

2 x 2 x 2 is the prime factorization of

• 6
• 12
• 22
• 8

One is

• prime

• composite

• not prime or composite

• the loneliest number

Use a number tree to find the prime factorization of 48

• 4x2x6
• 4x2x2x3
• 3x2x2x2x2
• 12x4

What is the LCM of 3 and 6? 

• 3
• 6
• 12
• 15

What is the least common multiple of 4 and 5?

• 40
• 60
• 1
• 20

Which set lists all the factors of 24?

• 1, 2, 3, 6, 7, 12, 24
• 1, 2, 3, 4, 6, 8, 12, 24
• 1, 2, 3, 4, 5, 6, 8, 12, 24
• 1, 3, 4, 6, 8, 24

Which is not a factor of 18?

• 7
• 2
• 3
• 9