Keystones — Lintel
Five GCSE retrieval questions · 24 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
45000000
Answer: 4.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 30°. Find opposite
Answer: 15cm -
4. Ratio Mixed ratio problems
Express the first part of 6:5 as a fraction in simplest form
Answer: 6⁄11 -
5. Statistics Mean
Calculate the mean of: 45, 32, 20, 48, 10, 17, 21, 36
Answer: 28.6