Keystones — Lintel
Five GCSE retrieval questions · 14 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 900,000,000 in standard form
Answer: 9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.86cm -
4. Ratio Mixed ratio problems
Divide 60 in the ratio 1:4:1
Answer: 10, 40 and 10 -
5. Statistics Mean
Calculate the mean of: 16, 50, 11, 29, 12, 48. Give your answer to 2 decimal places
Answer: 27.67