Keystones — Capstone
Five GCSE retrieval questions · 19 January 2026 · mathsvault.uk/keystones
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1. Number Dividing in standard form
Divide: 1.9 × 107 ÷ 6.7 × 106
Answer: 2.84 × 100 -
2. Algebra Solving non-monic quadratics
Solve: 3x² + 12x + 9 = 0
Answer: x = -1 or x = -3 -
3. Geometry SOHCAHTOA — missing angle
Adjacent = 15cm, hypotenuse = 20cm. Find the angle
Answer: 41.4° -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Median
Find the median of: 37, 51, 65, 28, 40, 45, 53, 47, 34, 52
Answer: 47