Prime #s, Prime Factorization, GCF and LCM (and some vocab!)

Prime numbers have:

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

Tags

CCSS.4.OA.B.4

Composite numbers:

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

Tags

CCSS.4.OA.B.4

Find the prime number.

• 10
• 9
• 7
• 4

Which number is composite?

• 11
• 13
• 21
• 23

Which number is NOT a factor of 10?

• 1
• 2
• 3
• 5

Tags

CCSS.4.OA.B.4

True or False? 2 is a COMPOSITE number.

• TRUE
• FALSE

Which is a prime number?

• 15
• 17
• 21
• 39

Which is the prime factorization of 12? 

• 2 x 6
• 2 + 2 + 2 + 2 + 2 + 2 
• 2² x 3
• 1 x 2 x 2 x 3

Tags

CCSS.6.EE.A.4

What is the prime factorization of 16? 

• 1 x 16
• 2² x 4
• 2⁴
• 8 + 8

Tags

CCSS.6.EE.A.1

CCSS.6.EE.A.3

Use a number tree to find the prime factorization of 36.

• 4 x 9
• 2² x 3²
• 2 x 2 x 9
• 2 x 2 x 3 x 3

Tags

CCSS.6.EE.A.4