Keystones — Lintel
Five GCSE retrieval questions · 13 June 2011 · 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 + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 23.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio £3 : 65p
Answer: 60:13 -
5. Statistics Mean
Calculate the mean of: 48, 42, 45, 48, 25, 48, 43. Give your answer to 2 decimal places
Answer: 42.71