Keystones — Lintel
Five GCSE retrieval questions · 16 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0025
Answer: 2.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 59°. Find opposite
Answer: 46.6cm -
4. Ratio Mixed ratio problems
Simplify: 16:24:8
Answer: 2:3:1 -
5. Statistics Mean
Calculate the mean of: 11, 13, 21, 33, 49, 39, 16
Answer: 26