Keystones — Lintel
Five GCSE retrieval questions · 12 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 88,000,000 in standard form
Answer: 8.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 45°. Find opposite
Answer: 27cm -
4. Ratio Mixed ratio problems
Simplify: 12:15:18
Answer: 4:5:6 -
5. Statistics Mean
Calculate the mean of: 35, 14, 17, 23, 47, 10, 31. Give your answer to 2 decimal places
Answer: 25.29