Keystones — Lintel
Five GCSE retrieval questions · 24 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.04 in standard form
Answer: 4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 45
Answer: (x + 9)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 34.64cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 150g
Answer: 20:3 -
5. Statistics Mean
Calculate the mean of: 47, 34, 36, 26, 44, 49, 8. Give your answer to 2 decimal places
Answer: 34.86