Keystones — Lintel
Five GCSE retrieval questions · 30 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00014
Answer: 1.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 57°. Find opposite
Answer: 15.4cm -
4. Ratio Mixed ratio problems
Express the first part of 6:2 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
Calculate the mean of: 39, 41, 49, 13, 11, 11
Answer: 27.3