Keystones — Lintel
Five GCSE retrieval questions · 22 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.084
Answer: 8.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 16
Answer: (x - 4)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 50°. Find opposite
Answer: 17.9cm -
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: 48, 16, 30, 44, 25, 25, 30, 47
Answer: 33.1