Keystones — Lintel
Five GCSE retrieval questions · 18 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 890,000 in standard form
Answer: 8.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 45
Answer: (x + 9)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 7.27cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6kg : 50g
Answer: 120:1 -
5. Statistics Mean
Calculate the mean of: 18, 27, 39, 30, 30, 48, 42, 40
Answer: 34.25