Keystones — Lintel
Five GCSE retrieval questions · 4 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
50000
Answer: 5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 32°. Find opposite
Answer: 15.6cm -
4. Ratio Mixed ratio problems
Express the first part of 3:2 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 20, 38, 15, 28, 43, 10, 7
Answer: 23