Keystones — Lintel
Five GCSE retrieval questions · 23 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 220,000 in standard form
Answer: 2.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.39cm -
4. Ratio Mixed ratio problems
Express the first part of 15:12 as a fraction in simplest form
Answer: 5⁄9 -
5. Statistics Mean
Calculate the mean of: 10, 8, 29, 26, 49, 31
Answer: 25.5