Keystones — Lintel
Five GCSE retrieval questions · 21 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.069
Answer: 6.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 31°. Find opposite
Answer: 12cm -
4. Ratio Mixed ratio problems
Express the first part of 4:5 as a fraction in simplest form
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 33, 10, 48, 50, 36, 11, 46
Answer: 33.4