Keystones — Lintel
Five GCSE retrieval questions · 23 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0097
Answer: 9.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 35°. Find opposite
Answer: 8.4cm -
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: 41, 12, 8, 12, 48, 33, 32
Answer: 26.6