Keystones — Lintel
Five GCSE retrieval questions · 29 September 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
97000
Answer: 9.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 50°. Find adjacent side
Answer: 23.8cm -
4. Ratio Mixed ratio problems
£140.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
Calculate the mean of: 6, 48, 6, 13, 11, 10, 31, 48
Answer: 21.6