2.1 Factors, Prime Factors & HCF

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

Which is not a factor of 21?

• 1
• 3
• 6
• 7

Tags

CCSS.4.OA.B.4

What is the prime factorization of 15?

• 3x3x3
• 2x2x5
• 15
• 3x5

Write 16 as its prime factors...

Complete in your copy ans select the correct answer.

• 2 x 2 x 2 x 2

• 2 x 2 x 2

• 2³

• 2

Which of these number is a factor of 12?

• 24

• 5

• 6

• 8

Tags

CCSS.4.OA.B.4

The factors of 52 are 1, 4, 13 and 52.

The prime factors of 52 are.....

• 1 and 13

• 1 and 4

• 13 and 52