TheSchoolRun.com closure date
As we informed you a few months ago, TheSchoolRun has had to make the difficult decision to close due to financial pressures and the company has now ceased trading. We had hoped to keep our content available through a partnership with another educational provider, but this provider has since withdrawn from the agreement.
As a result, we now have to permanently close TheSchoolRun.com. However, to give subscribers time to download any content they’d like to keep, we will keep the website open until 31st July 2025. After this date, the site will be taken down and there will be no further access to any resources. We strongly encourage you to download and save any resources you think you may want to use in the future.
In particular, we suggest downloading:
- Learning packs
- All the worksheets from the 11+ programme, if you are following this with your child
- Complete Learning Journey programmes (the packs below include all 40 worksheets for each programme)
You should already have received 16 primary school eBooks (worth £108.84) to download and keep. If you haven’t received these, please contact us at [email protected] before 31st July 2025, and we will send them to you.
We are very sorry that there is no way to continue offering access to resources and sincerely apologise for the inconvenience caused.
What is the highest common factor?
What is the highest common factor?
The highest common factor of two numbers is the largest whole number which is a factor of both. Teachers may introduce this concept to more able Year 6 children.
A factor is one of two or more numbers that divides a given number without a remainder.
Finding the highest common factor
To work out the highest common factor of two numbers, start by listing all the factors then compare the lists to find the largest number they have in common. For example:
What is the highest common factor of 16 and 48?
Factors of 16 are 1, 2, 4, 8 and 16.
Factors of 48 are 1, 2, 3, 4, 6, 8, 12, 16, 24 and 48.
So the highest common factor of 16 and 48 is 16.
A more difficult challenge may be to ask for the highest common factor of a group of three or four numbers.
For example:
What is the highest common factor of 21, 36 and 42?
Factors of 21 are 1, 3, 7 and 21.
Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18 and 36.
Factors of 42 are 1, 2, 3, 6, 7, 14, 21 and 42.
So the highest common factor of these three numbers is 3.
Finding the highest common factor of two numbers is an excellent way of getting children to practise their times tables and division facts. It also helps them to familiarise themselves with the term 'factors'.
A good challenge would be to give children puzzles where the factor rather than the original numbers are given, for example:
Two numbers have a highest common factor of 7. What could the two numbers be?
This way, children need to think carefully about what the numbers could be, then whittle the answer down to two numbers by a process of elimination.
(The answer to the above could be 14 and 49, but there may be other answers.)
