Keystones — Lintel
Five GCSE retrieval questions · 3 April 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,800,000 in standard form
Answer: 8.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.07cm -
4. Ratio Mixed ratio problems
Express the second part of 8:2 as a fraction in simplest form
Answer: 1⁄5 -
5. Statistics Mean
Calculate the mean of: 28, 38, 34, 28, 14, 22, 11, 11
Answer: 23.25