Keystones — Lintel
Five GCSE retrieval questions · 10 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 310,000 in standard form
Answer: 3.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.42cm -
4. Ratio Mixed ratio problems
Express the first part of 4:8 as a fraction in simplest form
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 7, 14, 27, 11, 24, 33, 47, 43
Answer: 25.75