Keystones — Lintel
Five GCSE retrieval questions · 21 September 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.08 in standard form
Answer: 8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 24
Answer: (x + 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 20.76cm -
4. Ratio Mixed ratio problems
Divide 203 in the ratio 2:1:4
Answer: 58, 29 and 116 -
5. Statistics Mean
Calculate the mean of: 29, 9, 35, 31, 25, 48, 16, 14. Give your answer to 2 decimal places
Answer: 25.88