Keystones — Lintel
Five GCSE retrieval questions · 21 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 440,000,000 in standard form
Answer: 4.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 54
Answer: (x + 6)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 28.29cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m : 55cm
Answer: 60:11 -
5. Statistics Mean
Calculate the mean of: 15, 35, 36, 37, 44, 44. Give your answer to 2 decimal places
Answer: 35.17