Keystones — Cornerstone
Five GCSE retrieval questions · 17 May 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 50 + ? = 106
Answer: 56 -
2. Algebra
Solve: x + 7 = 11
Answer: x = 4 -
3. Geometry
Opposite = 11cm, adjacent = 19cm. Calculate the angle
Answer: 30.1° -
4. Ratio
Find 80% of 492
Answer: 393.6 -
5. Statistics
Calculate the mean of: 37, 12, 29, 38, 33, 36
Answer: 30.8