Keystones — Cornerstone
Five GCSE retrieval questions · 25 January 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 38 + 80
Answer: 38 + 80 = 118 -
2. Algebra
Expand: 4(3x + 9)
Answer: 12x + 36 -
3. Geometry
Opposite = 9cm, hypotenuse = 18cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify: 10:12:10
Answer: 5:6:5 -
5. Statistics
Find the range of: 5, 33, 29, 16, 8
Answer: 28