Keystones — Lintel
Five GCSE retrieval questions · 6 June 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 850,000 in standard form
Answer: 8.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 36
Answer: (x + 9)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 43.27cm -
4. Ratio Mixed ratio problems
Simplify the ratio £1 : 50p
Answer: 2:1 -
5. Statistics Mean
Calculate the mean of: 43, 45, 44, 21, 36, 35, 21, 48. Give your answer to 2 decimal places
Answer: 36.63