Keystones — Lintel
Five GCSE retrieval questions · 4 January 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 64,000,000 in standard form
Answer: 6.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 50
Answer: (x + 10)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 7.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m : 30cm
Answer: 10:1 -
5. Statistics Mean
Calculate the mean of: 8, 11, 11, 12, 38, 19, 16, 11
Answer: 15.75