Keystones — Lintel
Five GCSE retrieval questions · 14 February 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000082 in standard form
Answer: 8.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 48
Answer: (x + 12)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.55cm -
4. Ratio Mixed ratio problems
£400.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £150.00 -
5. Statistics Mean
Calculate the mean of: 48, 11, 23, 41, 45, 22, 35, 24. Give your answer to 2 decimal places
Answer: 31.13