Keystones — Lintel
Five GCSE retrieval questions · 3 February 2022 · 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 - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 31°. Find opposite
Answer: 12cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 35, 9, 23, 45, 23, 30, 12, 37
Answer: 26.8