Prime Factorisation

A prime number...

• has one factor.
• has more than 2 factors.
• has 100 factors.
• has exactly 2 factors: 1 and the itself.

A composite number ...

• has more than 2 factors.
• has one factor.
• has at least 10 factors.
• is always a really big number.

Tags

CCSS.4.OA.B.4

All of these are prime except

• 3
• 9
• 2
• 13

Tags

CCSS.4.OA.B.4

Which list contains all prime numbers?

• 2, 3, 5, 7, 11
• 2, 3, 5, 7, 9
• 2, 4, 5, 7, 11
• 2, 3, 5, 7, 12

Tags

CCSS.4.OA.B.4

Which list contains composite numbers?

• 4, 6, 8, 9, 12
• 2, 4, 6, 7, 12
• 4, 6, 8, 9, 13
• 12, 14, 16, 17, 18

Tags

CCSS.4.OA.B.4

One is...

• prime

• composite

• not prime or composite

• the loneliest number

Is 5, a prime or composite number? 

• Prime
• Composite

Tags

CCSS.4.OA.B.4

Is 12, a prime or composite number? 

• Prime
• Composite

Which of the following is NOT prime?

• 29

• 23

• 17

• 39

2 x 2 x 2 is the prime factorization of...

• 6
• 12
• 22
• 8

Tags

CCSS.6.EE.A.1