Keystones — Lintel
Five GCSE retrieval questions · 10 September 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00055 in standard form
Answer: 5.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.44cm -
4. Ratio Mixed ratio problems
£329.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £188.00 -
5. Statistics Mean
Calculate the mean of: 17, 45, 6, 13, 41, 10
Answer: 22