Keystones — Lintel
Five GCSE retrieval questions · 10 October 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.033 in standard form
Answer: 3.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 48
Answer: (x + 12)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.25cm -
4. Ratio Mixed ratio problems
£230.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £138.00 -
5. Statistics Mean
Calculate the mean of: 36, 49, 5, 29, 11, 10, 38. Give your answer to 2 decimal places
Answer: 25.43