Primes, Composites, and Square Numbers

11

• Prime

• Composite

3

• Prime

• Composite

17

• Prime
• Composite

Tags

CCSS.4.OA.B.4

13

• Prime
• Composite

Tags

CCSS.4.OA.B.4

Which of the following numbers is composite?

• 1

• 5

• 3

• 6

Which of the following numbers is a prime number?

• 1
• 11
• 21
• 51

Tags

CCSS.4.OA.B.4

Which is a NOT a factor of 12?

• 1

• 3

• 5

• 4

Which of the following is NOT true about prime numbers? 

• They have exactly two factors 
• 1 is a factor of every prime number
• No prime numbers end in zero
• All prime numbers are odd numbers.  

Tags

CCSS.4.OA.B.4

Besides 15 and 1, what are two other factors of 15?

• 2, 5

• 4, 6

• 6, 8

• 3, 5

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