Keystones — Lintel
Five GCSE retrieval questions · 1 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00099 in standard form
Answer: 9.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 88
Answer: (x + 8)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.51cm -
4. Ratio Mixed ratio problems
Simplify the ratio £6 : 95p
Answer: 120:19 -
5. Statistics Mean
Calculate the mean of: 46, 17, 13, 14, 27, 5. Give your answer to 2 decimal places
Answer: 20.33