Keystones — Lintel
Five GCSE retrieval questions · 12 July 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.045 in standard form
Answer: 4.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 36
Answer: (x + 9)(x - 4) -
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 £5 : 60p
Answer: 25:3 -
5. Statistics Mean
Calculate the mean of: 44, 19, 25, 8, 25, 14, 7, 32
Answer: 21.75