Keystones — Lintel
Five GCSE retrieval questions · 11 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0011 in standard form
Answer: 1.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.46cm -
4. Ratio Mixed ratio problems
Simplify: 6:9:9
Answer: 2:3:3 -
5. Statistics Mean
Calculate the mean of: 11, 45, 46, 38, 43, 48, 33. Give your answer to 2 decimal places
Answer: 37.71