Factors and Prime Factors

A prime number...

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

Tags

CCSS.4.OA.B.4

Draw a number tree in your copy to find the prime factorization of 32.

Select which one is the correct answer.

• 2 x 2 x 2 x 3

• 2 x 2 x 2 x 2 x 2

What is the set of factors of 14?

• S={1, 14}

• S={1, 2, 7, 14}

• S={2, 7}

Tags

CCSS.4.OA.B.4

which number below is NOT prime?

• 7
• 9
• 2
• 3

Tags

CCSS.4.OA.B.4

What is the missing factor?

• 1

• 2

• 5

• 8

Tags

CCSS.4.OA.C.5

Is 8 a factor of 32? Yes or No

(a)  

Tags

CCSS.4.OA.B.4

Find the prime factorization of 40.

Draw out a prime factor tree in your copy and select the answer you think is correct.

• 2 x 5 x 2
• 2 x 20
• 5 x 8
• 2 x 2 x 2 x 5

Which is not a factor of 21?

• 1
• 3
• 6
• 7

Tags

CCSS.4.OA.B.4

Which number is the only even prime number?

• 0
• 2
• 1
• 3

Tags

CCSS.4.OA.B.4

What is the prime factorization of 15?

• 3x3x3
• 2x2x5
• 15
• 3x5