Keystones — Lintel
Five GCSE retrieval questions · 18 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.023
Answer: 2.3 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 52°. Find opposite
Answer: 26.9cm -
4. Ratio Mixed ratio problems
Express the first part of 4:3 as a fraction in simplest form
Answer: 4⁄7 -
5. Statistics Mean
Calculate the mean of: 44, 32, 19, 46, 15, 19, 48
Answer: 31.9