Keystones — Lintel
Five GCSE retrieval questions · 20 December 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 910,000 in standard form
Answer: 9.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x + 1
Answer: (x + 1)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.48cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m : 80cm
Answer: 5:1 -
5. Statistics Mean
Calculate the mean of: 30, 19, 27, 46, 7, 46. Give your answer to 2 decimal places
Answer: 29.17