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Lesson 5: Even and odd numbers

# Understanding even and odd numbers visually

Sal uses groups of objects to determine if there is an even or odd amount. Created by Sal Khan.

## Want to join the conversation?

• Is 7 odd or even?
• You can tell if a number is odd or even by looking at the last digit.
In other words, what the number ends in.
If the number ends in 2, 4, 6, 8, or 0, then the number is even.
If the number ends in 1, 3, 5, 7, or 9, then the number is odd.

Let's look at a few examples.

Is 10 even or odd?
Well, 10 ends with a 0.
That means that 10 is even.

Is 3 even or odd?
3 ends with a 3.
3 is odd.

Even if you don't know how to read that, you can still work out if it's even or odd.
You just have to look at what the number ends in.
23523 ends with a 3.
So twenty-three thousand, five hundred and twenty-three (23523) is odd.

Let's get back to your 7.
Is 7 even or odd?
7 ends with a 7.
So... 7 is odd!

I hope this helped!
Zo Ee :)
• why is 15 odd I thout it was even
• 15 is odd becase it is made out of 10 but if you add the 5 it will be odd now becase 5 is made out of 2 and 3.and 3 is 2 and 1 and 1 is odd.
• Can decimals be even or odd like half of 5 is 2.5 is that an even number?
• Decimals are neither even nor odd. Even or odd numbers must be integers which means no decimal places. Secondly, an even number must be exactly divisible by 2. Since 2.5 is not exactly divisible by 2 and is not an integer it is not an even number.
• is 1,000 odd or even
• Could you split 1,000 into two equal groups? If you can, it’s even. If you can’t, it’s odd.

Do you need more help from there?
• "Assuming you're not cutting up a seal"- Sal lol 😁
• Looooooooooolllllll!😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂
(1 vote)
• Make this easy for me
• It is very easy to tell whether a whole number is even or odd. Look at just the last (rightmost) digit.

If the last digit is 0, 2, 4, 6, or 8, then the number is even.

If the last digit is 1, 3, 5, 7, or 9, then the number is odd.

Have a blessed, wonderful day!
• how do i do dis pls help
• 2 4 6 8 10 are even so 22 56 98 anything that has those numbers are even. Odd are 1 3 5 7 9 so example 33 or 65 or 81 are odd.