Keystones — Lintel
Five GCSE retrieval questions · 11 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00062
Answer: 6.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 55°. Find opposite
Answer: 30cm -
4. Ratio Mixed ratio problems
Express the first part of 3:6 as a fraction in simplest form
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 50, 23, 15, 24, 14, 41, 45, 29
Answer: 30.1