Keystones — Lintel
Five GCSE retrieval questions · 18 July 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 54,000 in standard form
Answer: 5.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 132
Answer: (x + 12)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 21.61cm -
4. Ratio Mixed ratio problems
Simplify: 12:8:16
Answer: 3:2:4 -
5. Statistics Mean
Calculate the mean of: 24, 48, 35, 15, 14, 12, 14, 32
Answer: 24.25