Keystones — Lintel
Five GCSE retrieval questions · 12 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.072 in standard form
Answer: 7.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 19.61cm -
4. Ratio Mixed ratio problems
£210.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
Calculate the mean of: 21, 5, 25, 45, 9, 41. Give your answer to 2 decimal places
Answer: 24.33