Keystones — Lintel
Five GCSE retrieval questions · 26 September 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
710000
Answer: 7.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 49°. Find adjacent side
Answer: 24.3cm -
4. Ratio Mixed ratio problems
£180.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £80.00 -
5. Statistics Mean
Calculate the mean of: 20, 47, 44, 38, 42, 19
Answer: 35