Keystones — Lintel
Five GCSE retrieval questions · 21 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.07
Answer: 7 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 33°. Find opposite
Answer: 9.cm -
4. Ratio Mixed ratio problems
Express the first part of 2:4 as a fraction in simplest form
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 13, 32, 43, 45, 31, 44, 48, 49
Answer: 38.1