Keystones — Lintel
Five GCSE retrieval questions · 2 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
7700000
Answer: 7.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 37°. Find opposite
Answer: 15.cm -
4. Ratio Mixed ratio problems
Express the first part of 6:4 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 27, 10, 10, 9, 36, 27, 18, 42
Answer: 22.4