Keystones — Lintel
Five GCSE retrieval questions · 2 June 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00062
Answer: 6.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 39°. Find opposite
Answer: 12.cm -
4. Ratio Mixed ratio problems
Divide 99 in the ratio 3:2:4
Answer: 33, 22 and 44 -
5. Statistics Mean
Calculate the mean of: 20, 27, 28, 24, 18, 14, 20
Answer: 21.6