Keystones — Lintel
Five GCSE retrieval questions · 1 September 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.037 in standard form
Answer: 3.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.55cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £140.00 -
5. Statistics Mean
Calculate the mean of: 33, 20, 40, 9, 20, 18. Give your answer to 2 decimal places
Answer: 23.33