Skip to content
Try it The app CAO calculator Pricing Blog About FAQ
Free in the app

Highest Common Factor

Leaving Cert Maths · Number

Ordinary Level

The largest number that divides evenly into two or more given numbers. Example: the HCF of 12 and 18 is 6.

Maths is free in H1 Owl, Higher and Ordinary, with no daily limit.

More Number terms

Get the free study guide

H1 Owl is now on the App Store: download it for iPhone. Sign up here and get The Leaving Cert Maths Game Plan, our free PDF study guide, straight away, plus occasional study tips.

Occasional emails, no spam. Under 16? Ask a parent to sign up for you.

Where next

Five minutes a day beats a panicked weekend

Free to download. All of Maths is free forever, Higher and Ordinary.

Download for iPhone

Or learn on the web, same account, same progress.