Keystones — Lintel
Five GCSE retrieval questions · 22 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,700,000 in standard form
Answer: 4.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.31cm -
4. Ratio Mixed ratio problems
Red, blue and green counters are in the ratio 11:6:1. What fraction of the counters are green?
Answer: 1⁄18 -
5. Statistics Mean
Calculate the mean of: 45, 12, 42, 33, 26, 42, 6. Give your answer to 2 decimal places
Answer: 29.43