Keystones — Lintel
Five GCSE retrieval questions · 16 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 160,000,000 in standard form
Answer: 1.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 11
Answer: (x + 11)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 14.84cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6kg : 400g
Answer: 15:1 -
5. Statistics Mean
Calculate the mean of: 18, 36, 21, 19, 11, 42, 50. Give your answer to 2 decimal places
Answer: 28.14