Keystones — Lintel
Five GCSE retrieval questions · 3 July 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0096
Answer: 9.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 31°. Find opposite
Answer: 12.6cm -
4. Ratio Mixed ratio problems
Divide 95 in the ratio 2:2:1
Answer: 38, 38 and 19 -
5. Statistics Mean
Calculate the mean of: 36, 50, 31, 23, 46, 16, 8, 34
Answer: 30.5