Keystones — Lintel
Five GCSE retrieval questions · 24 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
97000000
Answer: 9.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 36°. Find opposite
Answer: 10.9cm -
4. Ratio Mixed ratio problems
Express the first part of 2:5 as a fraction in simplest form
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 24, 40, 5, 31, 14, 8, 46, 29
Answer: 24.6