Keystones — Lintel
Five GCSE retrieval questions · 6 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 69,000 in standard form
Answer: 6.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 27.53cm -
4. Ratio Mixed ratio problems
Simplify: 20:20:16
Answer: 5:5:4 -
5. Statistics Mean
Calculate the mean of: 17, 41, 23, 46, 44, 40, 13, 29. Give your answer to 2 decimal places
Answer: 31.63