Math 6/7 Prime, GCF, LCM

Prime numbers have:

• Exactly 2 factors
• 2 pairs of factors
• More than 2 factors
• 1 factor

Composite numbers:

• All even numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Tags

CCSS.4.OA.B.4

Find the prime factorization of 36

• 4 ⋅ 9
• 2² ⋅ 2³
• 2² ⋅ 3²
• 3² ⋅ 4 ⋅ 5

Find the prime factorization of 64

• 4³
• 2⁶
• 2⁴ ⋅ 3²
• 8²

Find the prime factorization of 81

• 3⁴
• 4³
• 81¹
• 3² ⋅ 2³

What are the prime factors of 30? 

• 3, 2, 5 
• 1, 2, 3, 5, 6, 15, 30
• 3, 30
• 10, 3

Which number is NOT prime?

• 3
• 7
• 17
• 21

Tags

CCSS.4.OA.B.4

GCF of 15 and 35

• 15
• 3
• 7
• 5

GCF of 12 and 28

• 3
• 6
• 2
• 4

Find the Least Common Multiple of 4 & 14.

• 14
• 20
• 28
• 42