Keystones — Lintel
Five GCSE retrieval questions · 12 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.082
Answer: 8.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 51°. Find adjacent side
Answer: 21.4cm -
4. Ratio Mixed ratio problems
Express the first part of 2:3 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 40, 33, 7, 13, 45, 9, 39
Answer: 26.6