Keystones — Lintel
Five GCSE retrieval questions · 30 June 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0029
Answer: 2.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 57°. Find opposite
Answer: 44.7cm -
4. Ratio Mixed ratio problems
£192.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £120.00 -
5. Statistics Mean
Calculate the mean of: 13, 43, 45, 32, 21, 23, 25
Answer: 28.9