Keystones — Lintel
Five GCSE retrieval questions · 27 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 860,000,000 in standard form
Answer: 8.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x + 5
Answer: (x + 5)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 33.34cm -
4. Ratio Mixed ratio problems
Divide 144 in the ratio 2:4:3
Answer: 32, 64 and 48 -
5. Statistics Mean
Calculate the mean of: 46, 42, 10, 21, 44, 22. Give your answer to 2 decimal places
Answer: 30.83