Keystones — Lintel
Five GCSE retrieval questions · 18 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
4800000
Answer: 4.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 53°. Find opposite
Answer: 26.5cm -
4. Ratio Mixed ratio problems
Express the first part of 2:5 as a fraction in simplest form
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 15, 47, 17, 33, 30, 23, 20, 13
Answer: 24.8