Factoring Numbers

What are the first five multiples of 3?

• 3, 6, 9, 12, and 15

• 3, 6, 9, 12, and 18

• 3, 6, 9, 10, and 15

• 3, 5, 9, 12, and 15

Which of the following is a factor of 18?

• 4

• 7

• 6

• 12

Which of the following is a factor of 23? 8, 4, 3, 1

• 8

• 4

• 3

• 1

Is 5 a factor of 32?

• Yes, 5 is a factor of 32.

• No, 5 is not a factor of 32.

• 5 is a factor of 16.

• 5 is a factor of 40.

What is the greatest common factor (GCF) of 8 and 12?

• 2

• 3

• 4

• 6

What is the prime factorization of 30?

• 2 × 3 × 5

• 3 × 10

• 5 × 6

• 2 × 15

What is a composite number?

• A number that has only two factors.

• A number that has more than two factors.

• A prime number that is greater than one.

• A number that is divisible by only itself.

How do you determine if a number is a factor of another number?

• A number is a factor of another number if the second number can be divided by the first number without a remainder.

• A number is a factor of another number if it is greater than the second number.

• A number is a factor of another number if it is a prime number.

• A number is a factor of another number if it is an even number.

What is the difference between prime and composite numbers?

• Prime numbers have exactly one factor (1).

• Composite numbers have exactly two factors (1 and itself).

• Prime numbers have exactly two factors (1 and itself), while composite numbers have more than two factors.

• Prime numbers are always even numbers.

What is the factor pair of 20 that includes 5?

• (5, 4)

• (2, 10)

• (1, 20)

• (4, 5)