Keystones — Lintel
Five GCSE retrieval questions · 27 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0001
Answer: 1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 38°. Find opposite
Answer: 8.6cm -
4. Ratio Mixed ratio problems
Express the first part of 6:2 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
Calculate the mean of: 28, 38, 7, 11, 47, 6, 37
Answer: 24.9