Keystones — Lintel
Five GCSE retrieval questions · 31 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
230000
Answer: 2.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 63°. Find adjacent side
Answer: 14.5cm -
4. Ratio Mixed ratio problems
Express the first part of 3:2 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 47, 14, 38, 6, 46, 40, 16, 16
Answer: 27.9