Keystones — Lintel
Five GCSE retrieval questions · 14 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 28,000 in standard form
Answer: 2.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.66cm -
4. Ratio Mixed ratio problems
Divide 120 in the ratio 4:1:3
Answer: 60, 15 and 45 -
5. Statistics Mean
Calculate the mean of: 26, 13, 13, 14, 45, 5, 40. Give your answer to 2 decimal places
Answer: 22.29