Highest common factor (HCF) (Core) · Practice set 1

What your child practises

Skills: Highest common factor (HCF) (level 2).

Applying a method step by step and checking the answer – the skills secondary-school maths tests are built on.

What’s included

• 15 questions
• An answer key you can print with the sheet or on its own
• An on-screen version with instant marking and stars

Age and school year

Made for ages 12–18. That’s Grade 7–12 in the US, Year 8–13 in England, JSS 1 – SS 3 in Nigeria and Class 7–12 in India.

How to use it

• Print it at home or school – it fits a standard A4 or US Letter page.
• Print the answer key too, so marking takes seconds.
• Play it on screen: answers are marked instantly and children earn stars.
• Write on it on a tablet or touchscreen with a finger or stylus – no printer needed.

Tips for parents and teachers

1. 1Play it on screen for instant feedback, then print a fresh version as a timed, calculator-free check.
2. 2Redo three of the questions a week later: spaced recall is one of the surest ways to make methods stick.
3. 3Encourage teens to set their own target (say 12 out of 15) and track it over a few attempts.