Keystones — Lintel
Five GCSE retrieval questions · 30 November 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
130000
Answer: 1.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 46°. Find opposite
Answer: 20.7cm -
4. Ratio Mixed ratio problems
Express the first part of 3:4 as a fraction in simplest form
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 38, 46, 19, 44, 26, 28, 33, 22
Answer: 32