Week 3 - Prime Factor Decomposition

What are the prime decomposition factors of 20?

• 2, 2, 5

• 2, 2, 4

• 2, 3, 5

• 2, 4, 5

What is 20 in index notation form?

• 2 x 4 x 5

• 2 x 2 x 5

• 4 x 5

• 2² x 5

What prime numbers can you multiply to get to the top of the factor tree?

• 3, 4, 2, 2

• 5, 3, 2, 2

• 5, 3, 4, 2

• 12, 4, 2, 2

Which of the following is a correct set of non-prime factors for 80?

• 2⁴ x 5

• 20 x 4

• 2³ x 5²

• 5² x 2³

What is the value for the prime factorization of 2³ • 3² • 7 ?

• 324

• 404

• 156

• 504

What goes in the blank boxes in the factor tree below?

• 2, 4

• 4, 5

• 10, 5

• 10, 2

What numbers should go in the blank boxes below?

• 3, 4, 4, 2

• 3, 8, 4, 2

• 3, 4, 8, 3

• 3, 8, 4, 4

What goes in the blank boxes below?

• 2, 2, 2, 2, 2

• 2, 2, 2, 2, 3

• 2, 2, 2, 3, 3

• 2, 2, 2, 4, 4

64 written in expanded notation is?

• 2⁵

• 2⁶

• 2 x 2 x 2 x 2 x 2 x 2

• 2 x 2 x 2 x 2 x 2

The number 2 would symbolize which of the following ?

• The biggest prime number

• The smallest prime number

• A composite number

• A big number