Keystones — Lintel
Five GCSE retrieval questions · 16 November 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 740,000,000 in standard form
Answer: 7.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x + 8
Answer: (x + 4)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 35.21cm -
4. Ratio Mixed ratio problems
Orange, purple and pink sweets are in the ratio 6:5:9. What fraction of the sweets are orange?
Answer: 3⁄10 -
5. Statistics Mean
Calculate the mean of: 27, 23, 10, 38, 16, 6, 48
Answer: 24