Keystones — Lintel
Five GCSE retrieval questions · 12 August 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00034
Answer: 3.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 50°. Find opposite
Answer: 29.8cm -
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: 16, 18, 5, 29, 50, 44, 5
Answer: 23.9