Keystones — Lintel
Five GCSE retrieval questions · 30 September 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
69000000
Answer: 6.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 55°. Find opposite
Answer: 31.4cm -
4. Ratio Mixed ratio problems
£150.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £90.00 -
5. Statistics Mean
Calculate the mean of: 45, 19, 5, 25, 22, 18, 11
Answer: 20.7