Prime, Composite, Multiples, Factors Study Guide

What is a prime number?

• A prime number is a number with more than two factors

• A prime number is a number with exactly two factors

Is 1 a prime number? (yes/no)

• I don't know

• sometimes

• yes

• no

What is the smallest prime number?

• 4

• 2

• 3

• 1

What is a composite number?

• A composite number is a negative integer that has at least one negative divisor other than one or itself.

• A composite number is a positive integer that has at least one positive divisor other than one or itself.

• A composite number is a fraction that has at least one positive divisor other than one or itself.

• A composite number is a positive integer that has no positive divisors other than one or itself.

Is 2 a composite number? (yes/no)

• I don't know

• maybe

• no

• yes

What is the largest composite number less than 10?

• 9

• 8

• 6

• 7

What are the multiples of 5?

• 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ...

• 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ...

• 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ...

• 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, ...

What are the factors of 12?

• 1, 2, 3, 4, 6, 8, 10

• 1, 2, 3, 4, 6, 12

• 1, 2, 3, 4, 6, 8

• 1, 2, 3, 4, 6

Is 7 a factor of 28? (yes/no)

• maybe

• yes

• sometimes

• no

What is the least common multiple of 4 and 6?

• 12

• 10

• 8

• 2