Keystones — Cornerstone
Five GCSE retrieval questions · 24 March 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 40 + ? = 176
Answer: 136 -
2. Algebra
What is the next term? 7, 14, 28, 56, ...
Answer: 112 -
3. Geometry
Opposite = 15cm, hypotenuse = 17.3cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify: 12:24:16
Answer: 3:6:4 -
5. Statistics
Calculate the mean of: 43, 13, 40, 15, 49, 38
Answer: 33