Keystones — Lintel
Five GCSE retrieval questions · 11 July 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000055 in standard form
Answer: 5.5 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 50
Answer: (x + 10)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.63cm -
4. Ratio Mixed ratio problems
£279.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £155.00 -
5. Statistics Mean
Calculate the mean of: 27, 15, 10, 24, 38, 40. Give your answer to 2 decimal places
Answer: 25.67