Keystones — Lintel
Five GCSE retrieval questions · 26 January 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 890,000 in standard form
Answer: 8.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 72
Answer: (x + 9)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 22.21cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 600 ml
Answer: 20:3 -
5. Statistics Mean
Calculate the mean of: 10, 20, 30, 28, 35, 34, 18, 41
Answer: 27