Keystones — Cornerstone
Five GCSE retrieval questions · 18 June 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 80 + ? = 150
Answer: 70 -
2. Algebra
What is the next term? 6, 18, 54, 162, ...
Answer: 486 -
3. Geometry
Opposite = 17cm, adjacent = 10cm. Calculate the angle
Answer: 59.5° -
4. Ratio
Simplify: 12:18:18
Answer: 2:3:3 -
5. Statistics
Find the mean of: 20, 3, 19, 11, 16
Answer: 13.8