Keystones — Lintel
Five GCSE retrieval questions · 3 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00074
Answer: 7.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 38°. Find opposite
Answer: 16.4cm -
4. Ratio Mixed ratio problems
Divide 156 in the ratio 3:2:1
Answer: 78, 52 and 26 -
5. Statistics Mean
Calculate the mean of: 13, 30, 43, 10, 20, 23
Answer: 23.2