Keystones — Lintel
Five GCSE retrieval questions · 16 July 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0064
Answer: 6.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 53°. Find opposite
Answer: 30.5cm -
4. Ratio Mixed ratio problems
Express the first part of 5:4 as a fraction in simplest form
Answer: 5⁄9 -
5. Statistics Mean
Calculate the mean of: 22, 42, 43, 23, 26, 37, 40, 49
Answer: 35.3