Keystones — Lintel
Five GCSE retrieval questions · 23 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.061
Answer: 6.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 57°. Find opposite
Answer: 30.8cm -
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: 35, 19, 35, 48, 43, 12, 25
Answer: 31