Number Properties and Factors

Which number is a factor of all numbers?

• 5

• 10

• 0

• 1

Use a factor tree to find prime factorization of 24.

• 2 x 3 x 2 x 3

• 2 x 3 x 2 x 2

• 6 x 2 x 2

• 2 x 3 x 4

Which of the following numbers is prime?

• 15

• 18

• 19

• 21

Which of the following is NOT prime?

• 11

• 13

• 19

• 21

What is the prime factorization of 15?

• 3x3x3

• 2x2x5

• 15

• 3x5

What is the missing factor?

• 1

• 2

• 5

• 8

What is the missing factor?

• 3

• 5

• 6

• 7

Find the prime number

• 10

• 9

• 7

• 4

Find the prime number.

• 10

• 9

• 7

• 4

What is the commutative property of addition?

• Adding two numbers always results in a larger sum.

• The sum of two numbers is always equal to their product.

• The order of the numbers being added changes the sum.

• Changing the order of the numbers being added does not change the sum.