Keystones — Lintel
Five GCSE retrieval questions · 8 June 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0043
Answer: 4.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 59°. Find opposite
Answer: 28.3cm -
4. Ratio Mixed ratio problems
£216.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £135.00 -
5. Statistics Mean
Calculate the mean of: 34, 32, 33, 10, 8, 9, 45, 16
Answer: 23.4