Keystones — Lintel
Five GCSE retrieval questions · 4 April 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
16000
Answer: 1.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 57°. Find opposite
Answer: 18.5cm -
4. Ratio Mixed ratio problems
£400.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £150.00 -
5. Statistics Mean
Calculate the mean of: 32, 6, 49, 5, 7, 13, 22
Answer: 19.1