Keystones — Lintel
Five GCSE retrieval questions · 18 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00096 in standard form
Answer: 9.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 21
Answer: (x + 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 37.05cm -
4. Ratio Mixed ratio problems
£308.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £88.00 -
5. Statistics Mean
Calculate the mean of: 35, 36, 39, 37, 19, 23, 38. Give your answer to 2 decimal places
Answer: 32.43