Keystones — Lintel
Five GCSE retrieval questions · 21 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
990000
Answer: 9.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 33°. Find opposite
Answer: 13.6cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 4:2:1
Answer: 96, 48 and 24 -
5. Statistics Mean
Calculate the mean of: 45, 28, 34, 44, 29, 47, 26
Answer: 36.1