5th Grade Review

Prime Factorization of 64

• 2 , 2 , 2 , 3 , 5

• 2 , 2 , 2 , 2

• 2 , 2 , 2 , 2 , 2 , 2

Find the factor pairs of 20 .

• 1 , 2 , 4 , 5 , 10 , 20

• 1 , 2 , 5 , 7 , 8 , 9

• 1 , 3 , 2 , 5 , 6

2 x 2 x 2 is the prime factorization of

• 6
• 12
• 22
• 8

Find the prime factorization of 40

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

What is the prime factorization of 15?

• 3x3x3
• 2x2x5
• 15
• 3x5

Which one shows ALL of the factors of 6?

• 1, 6, 12
• 1, 2, 3, 6
• 1, 2, 3,
• 1, 6

Which one lists ALL of the factors of 18?

• 1, 2, 9, 18
• 1, 18
• 1, 2, 3, 6, 9, 18
• 2, 3, 6, 9

Which is not a factor of 24?

• 2

• 3

• 4

• 5

A PRIME NUMBER is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

Which one shows ALL of the factors of 6?

• 1, 6, 12
• 1, 2, 3, 6
• 1, 2, 3,
• 1, 6