Keystones — Lintel
Five GCSE retrieval questions · 26 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00057
Answer: 5.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 36°. Find opposite
Answer: 13.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: 5, 28, 6, 41, 46, 8
Answer: 22.3