Keystones — Lintel
Five GCSE retrieval questions · 13 August 2025 · mathsvault.uk/keystones
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1. Number
0.00088
Answer: 8.8 × 10^-4 -
2. Algebra
Solve: 9x = 90
Answer: x = 10 -
3. Geometry
Opposite = 17cm, adjacent = 17cm. Calculate the angle
Answer: 45° -
4. Ratio
Simplify: 16:24:20
Answer: 4:6:5 -
5. Statistics
Find the range of: -22, -28, 8, 21, -30
Answer: 51