Keystones — Lintel
Five GCSE retrieval questions · 9 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.032
Answer: 3.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 34°. Find opposite
Answer: 13.5cm -
4. Ratio Mixed ratio problems
Divide 60 in the ratio 2:2:1
Answer: 24, 24 and 12 -
5. Statistics Mean
Calculate the mean of: 28, 13, 32, 9, 43, 7, 25, 40
Answer: 24.6