Keystones — Lintel
Five GCSE retrieval questions · 7 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 300,000 in standard form
Answer: 3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x + 6
Answer: (x + 6)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 32.62cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 450 ml
Answer: 80:9 -
5. Statistics Mean
Calculate the mean of: 6, 50, 21, 14, 16, 15, 6, 47. Give your answer to 2 decimal places
Answer: 21.88