Keystones — Lintel
Five GCSE retrieval questions · 9 June 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00087
Answer: 8.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 37°. Find opposite
Answer: 18.cm -
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: 7, 47, 39, 38, 12, 10, 5, 6
Answer: 20.5