Keystones — Lintel
Five GCSE retrieval questions · 4 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.081
Answer: 8.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 36°. Find opposite
Answer: 7.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 5, 8, 22, 9, 8, 50
Answer: 17