Keystones — Lintel
Five GCSE retrieval questions · 7 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 580,000 in standard form
Answer: 5.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 8
Answer: (x + 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 14.95cm -
4. Ratio Mixed ratio problems
Simplify the ratio £7 : 10p
Answer: 70:1 -
5. Statistics Mean
Calculate the mean of: 28, 35, 44, 9, 23, 29, 40. Give your answer to 2 decimal places
Answer: 29.71