Odd and Even Numbers

​Odd and Even Numbers: The Partner Rule

The easiest way to tell if a number is Odd or Even is to see if every item in that number can find a partner!

By Govind Keshari

​The Even Numbers

Even numbers are the friendly numbers where everyone gets a partner.

When you look at the last digit of an Even number, it will always be one of these five digits:
0, 2, 4, 6 or 8

​20	​Even
​32	​Even
​44	​Even
​64	​Even
​78	​Even

​26	​Even
​34	​Even
​46	​Even
​60	​Even
​78	​Even

​The Rule:

If you try to share an Even number of objects between two people, they will get the exact same amount, and there will be zero left over.

Example:











Conclusion: 4 is an Even Number.

​Part 2: The Odd Numbers

Odd numbers are the numbers where one item is always left without a partner.

When you look at the last digit of an Odd number, it will always be one of these five digits:

1, 3, 5, 7 or 9

​The Rule:

If you try to share an Odd number of objects between two people, someone will be left with one item extra.

Example:










The Number 5 Imagine you have 5 bananas. Can every banana find a partner? You can make two pairs (4 bananas), but one banana is left all alone! Result: One banana is left without a partner. Conclusion: 5 is an Odd Number.

Multiple Choice

Is the sum of 7+3 is even or odd?

• Even

• Odd

Multiple Choice

what is the opposite of EVEN?

• Subtraction

• Addition

• Odd

• Divide

Multiple Choice

Which sum creates an even number?

Multiple Choice

Which number is odd?

Multiple Choice

Which number is even?

Multiple Choice

If everyone in a number can find a partner, what kind of number is it?

• A Big Number

• An Even Number

• A Small Number

• An Odd Number

Multiple Choice

What is the last digit of an Even number always?

• 0, 2, 4, 6, or 8

• Only 0

• 1, 3, 5, 7, or 9

• Any number

Multiple Choice

Is the number 7 an Odd or Even number?

• Odd

• Even

Multiple Choice

Which of these numbers is an Even number?

• 3

• 9

• 8

• 5

Multiple Choice

If you have 11 cookies, can everyone find a partner?

• Yes, all 11 cookies have partners.

• No, one cookie will be left alone.

Multiple Choice

What is the last digit of an Odd number always?

• 0, 2, 4, 6, or 8

• 
  Only 5

• 1, 3, 5, 7, or 9

• Any number except 0

Multiple Choice

Is the number 42 an Odd or Even number?

• Even

• Odd

Multiple Choice

Which of these numbers is an Odd number?

• 15

• 12

• 10

• 18

Multiple Choice

If a number ends with a 0, like 30, is it Odd or Even?

• Odd

• Even

Multiple Choice

Imagine you have a group of 23 marbles. Is this an Odd or Even number of marbles?

• Even

• Odd

Categorize

Options (17)

12

32

44

78

102

204

108

304

506

3

15

79

99

103

207

309

505

Organize these options into the right categories

Even Number

Odd number

Multiple Choice

odd + even = even

• False

• True

Multiple Choice

even + odd = odd

• True

• False

Multiple Choice

even + even = odd

• True

• False

Multiple Choice

odd + odd = even

• True

• False

Multiple Choice

odd - odd = even

• False

• True

Multiple Choice

odd - odd = odd

• True

• False

Multiple Choice

odd + odd = odd

• True

• False

Multiple Choice

even + even + even = even

• True

• False