Keystones — Lintel
Five GCSE retrieval questions · 24 June 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 + x - 72
Answer: (x + 9)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 37.06cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4kg : 600g
Answer: 20:3 -
5. Statistics Mean
Calculate the mean of: 32, 25, 11, 37, 46, 9. Give your answer to 2 decimal places
Answer: 26.67