Keystones — Lintel
Five GCSE retrieval questions · 10 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.05 in standard form
Answer: 5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x + 25
Answer: (x + 5)(x + 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 45°. Find opposite
Answer: 20cm -
4. Ratio Mixed ratio problems
Simplify: 15:15:9
Answer: 5:5:3 -
5. Statistics Mean
Calculate the mean of: 39, 16, 37, 21, 12, 22
Answer: 24.5