Keystones — Lintel
Five GCSE retrieval questions · 13 April 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.071
Answer: 7.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 45°. Find adjacent side
Answer: 21.2cm -
4. Ratio Mixed ratio problems
Express the first part of 6:4 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 22, 45, 48, 26, 38, 14, 5, 46
Answer: 30.5