Keystones — Lintel
Five GCSE retrieval questions · 3 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,000,000 in standard form
Answer: 6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 5
Answer: (x + 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 32.01cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 4:1:4
Answer: 96, 24 and 96 -
5. Statistics Mean
Calculate the mean of: 17, 23, 29, 6, 9, 21, 27, 18
Answer: 18.75