Keystones — Lintel
Five GCSE retrieval questions · 9 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
7100000
Answer: 7.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 37°. Find opposite
Answer: 15.cm -
4. Ratio Mixed ratio problems
Express the first part of 4:3 as a fraction in simplest form
Answer: 4⁄7 -
5. Statistics Mean
Calculate the mean of: 42, 27, 31, 8, 7, 12
Answer: 21.2