In this guide, we explain what odd and even numbers are and explore all of the numbers from 1 to 100!
Author
Gary Ferguson
Published
July 29, 2022
In this guide, we explain what odd and even numbers are and explore all of the numbers from 1 to 100!
Author
Gary Ferguson
Published
July 29, 2022
Let’s learn what odd and even numbers are and explore them from 1 to 100!
Author
Gary Ferguson
Published
July 29, 2022
Key takeaways
You may have heard lots about odd and even numbers, but what exactly are they? In this blog, we’ll explore this in more detail and look at examples of odd and even numbers from 1 to 100.
Even numbers are divisible by 2, while odd numbers aren’t.
This means that if you divide an even number by 2, you’ll always get a whole number result (e.g. 10/2 = 5). On the other hand, if you divide an odd number by 2, the result won’t be a whole number (e.g. 9/2 = 4.5).
Keeping this rule in mind can be really helpful when it comes to doing things like addition, subtraction, multiplication and division.
In fact, this divisibility rule can be applied to any even or odd number, not just those between 1 and 100!
Ready to test your knowledge? Have a go at our interactive practice questions!
1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99.
2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100.
Check out our step-by-step video for some super easy ways to recognise odd and even numbers! Be sure to check out our bank of topic walkthroughs for even more guides (perfect for sharing with your child or in class!).
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Knowing whether a number is odd or even can be helpful in lots of situations. For example, in multiplication and division questions, you can use the fact that odd numbers always give odd results when multiplied together, and even numbers always give even results.
As outlined in the national curriculum, pupils start to learn about odd and even numbers in Key Stage 1:
“They practise counting as reciting numbers and counting as enumerating objects and counting in 2s, 5s and 10s from different multiples to develop their recognition of patterns in the number system (for example, odd and even numbers).”
It might seem strange, but yes! This is because dividing 0 by 2 gives you 0, which is a whole number.
Yes, 1 is an odd number. All numbers that aren’t divisible by 2 are odd numbers. This includes 1, 3, 5, 7, 9, 11, 13 and so on.
How cool is this? Odd numbers need to end in 1, 3, 5, 7, 9, and as a result, each number has a letter ‘e’. Mind = blown!
Prime numbers are odd because they can’t be divided by 2 to give a whole number – except for 2 itself, which is the only even prime number!
Here are some examples of odd prime numbers:
3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47.
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There are lots of things that you can do to explore odd and even numbers with your child or pupils.
Finally, you can try some fun activities together with a friend or family member.
1. See if you can find any patterns with odd and even numbers
2. Have a competition with a friend or family member to see who can get to 100 first by only adding odd or even numbers
3. See who can make the biggest odd or even number using the digits 1 to 9
4. Try to find as many different odd and even numbers as you can
5. Try to solve riddles; for example:
I am an odd number. Take away one letter, and I become even. What number am I?
We hope you have fun with these odd and even number activities!
Even though odd and even numbers seem simple enough, it can be helpful to have a basic understanding of what they are. This knowledge becomes especially helpful when doing things like addition, subtraction, multiplication and division.
We hope you’ve found this article helpful in learning more about these two types of numbers! For even more ways to explore odd and even numbers, don’t forget to download the DoodleMaths app. It’s filled with thousands of fun, interactive exercises – and is proven to boost confidence and ability in maths!
Answer to riddle: seven (take away the letter ‘s’ and it becomes ‘even’!)
Rational and irrational numbers
Learn about the differences between rational and irrational numbers
Roman numerals from 1 to 100
Learn the Roman numerals from 1 to 100 and have a go at some questions!
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