Keystones — Lintel
Five GCSE retrieval questions · 6 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0021 in standard form
Answer: 2.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 90
Answer: (x + 10)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 45°. Find opposite
Answer: 12cm -
4. Ratio Mixed ratio problems
Divide 144 in the ratio 4:4:1
Answer: 64, 64 and 16 -
5. Statistics Mean
Calculate the mean of: 37, 12, 50, 44, 41, 32, 22
Answer: 34