Keystones — Lintel
Five GCSE retrieval questions · 20 April 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
750000
Answer: 7.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 64°. Find adjacent side
Answer: 12.3cm -
4. Ratio Mixed ratio problems
Divide 196 in the ratio 4:2:1
Answer: 112, 56 and 28 -
5. Statistics Mean
Calculate the mean of: 32, 30, 45, 8, 28, 44, 46
Answer: 33.3