Ages 15–17
BrainteenAges 15–17MathsWorksheet
Circle theorems (Challenging)
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About this activity
What your child practises
Quick, accurate calculation and recall of number facts, building the fluency harder maths depends on.
What’s included
- 10 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 15–17. That’s Grade 10–12 in the US, Year 11–13 in England, SS 1–3 in Nigeria and Class 10–12 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
- Time one try, then beat it a few days later – children love racing their own best rather than others.
- Pair an easier sheet with a harder one in the same session so practice always ends on a success.
- Encourage teens to set their own target (say 12 out of 15) and track it over a few attempts.
Good to know
- Time needed
- About 15–25 minutes
- You’ll need
- A printer (or a tablet to work on screen), a pencil and an eraser
- Difficulty
- Hardest (Challenging) – pitched at ages 15–17
- Answer key
- Yes – print it with the sheet or on its own