Keystones — Lintel
Five GCSE retrieval questions · 13 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.019
Answer: 1.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 38°. Find opposite
Answer: 11.7cm -
4. Ratio Mixed ratio problems
Express the first part of 5:6 as a fraction in simplest form
Answer: 5⁄11 -
5. Statistics Mean
Calculate the mean of: 8, 31, 31, 12, 28, 50
Answer: 26.7