Keystones — Lintel
Five GCSE retrieval questions · 13 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000058 in standard form
Answer: 5.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 40
Answer: (x + 10)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 10.17cm -
4. Ratio Mixed ratio problems
Divide 198 in the ratio 2:3:4
Answer: 44, 66 and 88 -
5. Statistics Mean
Calculate the mean of: 23, 48, 20, 18, 7, 8, 17, 50. Give your answer to 2 decimal places
Answer: 23.88