Keystones — Lintel
Five GCSE retrieval questions · 5 September 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.085 in standard form
Answer: 8.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 32
Answer: (x + 4)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.58cm -
4. Ratio Mixed ratio problems
£240.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £150.00 -
5. Statistics Mean
Calculate the mean of: 41, 44, 23, 6, 33, 18, 6. Give your answer to 2 decimal places
Answer: 24.43