Keystones — Lintel
Five GCSE retrieval questions · 12 November 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0004
Answer: 4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 44°. Find opposite
Answer: 25.cm -
4. Ratio Mixed ratio problems
Express the first part of 5:4 as a fraction in simplest form
Answer: 5⁄9 -
5. Statistics Mean
Calculate the mean of: 42, 47, 45, 35, 26, 22
Answer: 36.2