Keystones — Lintel
Five GCSE retrieval questions · 14 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.022 in standard form
Answer: 2.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 19.12cm -
4. Ratio Mixed ratio problems
Red, blue and green sweets are in the ratio 5:2:1. What fraction of the sweets are green?
Answer: 1⁄8 -
5. Statistics Mean
Calculate the mean of: 39, 36, 30, 37, 7, 15. Give your answer to 2 decimal places
Answer: 27.33