Keystones — Lintel
Five GCSE retrieval questions · 3 July 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.044 in standard form
Answer: 4.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 90
Answer: (x + 10)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 11.47cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m : 80cm
Answer: 25:4 -
5. Statistics Mean
Calculate the mean of: 47, 13, 43, 32, 47, 9, 38. Give your answer to 2 decimal places
Answer: 32.71