Keystones — Lintel
Five GCSE retrieval questions · 19 March 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 860,000 in standard form
Answer: 8.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 21x + 110
Answer: (x + 11)(x + 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 18.31cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 litre : 300 ml
Answer: 10:3 -
5. Statistics Mean
Calculate the mean of: 18, 33, 23, 29, 16, 24, 35. Give your answer to 2 decimal places
Answer: 25.43