Keystones — Lintel
Five GCSE retrieval questions · 27 May 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00073
Answer: 7.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 30°. Find opposite
Answer: 17.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 35, 38, 44, 12, 26, 42, 38, 50
Answer: 35.6