Facts About Numbers

How do you know if a number is odd?

• You look at the last digit to see if it is 0, 2, 4, 6, and 8.

• You look at the first digit in the number to see if it is even.

• You look at the last digit to see if it is 1, 3, 5, 7, and 9

• You look at the first number to see if it is odd.

Which numbers are odd numbers? [Check all answers that apply]

• 12

• 25

• 37

• 42

• 111

The opposite of an ODD NUMBER is an ______________ NUMBER.

How do you know if a number is EVEN?

• Look at the first number to see if it is even.

• Look to see if the number ends with a 0, 2, 4, 6, or 8.

• Look to see if the number ends in a 1, 3, 5, 7, or 9.

• Look at the first number to see if it is odd.

Which numbers are EVEN NUMBERS? [Check all answers that apply]

• 24

• 30

• 99

• 100

• 1,000,001

What is a FACTOR?

• I have no idea.

• The answer to an addition problem.

• The answer to a division problem.

• A number that fits evenly into another number.

What are the factors of 6? [Check all that apply]

• 1

• 6

• 2

• 3

• 8

What are the factors of 25? [Check all that apply]

• 1

• 21

• 5

• 25

What are multiples?

• The answer to a multiplication problem.

• The answer to a division problem.

• Skip counting by a number repeatedly.

• I have no idea.

Which are the multiples of 5?

• 2, 4, 6, 8, 10

• 3, 6, 9, 12, 15

• 5, 10, 15, 20, 25

• 4, 8, 12, 16, 20