Keystones — Lintel
Five GCSE retrieval questions · 22 October 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0032 in standard form
Answer: 3.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.43cm -
4. Ratio Mixed ratio problems
£185.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £74.00 -
5. Statistics Mean
Calculate the mean of: 15, 14, 45, 23, 19, 28, 8, 39. Give your answer to 2 decimal places
Answer: 23.88