Keystones — Lintel
Five GCSE retrieval questions · 9 October 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
42000
Answer: 4.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 34°. Find opposite
Answer: 8.cm -
4. Ratio Mixed ratio problems
Divide 108 in the ratio 3:2:4
Answer: 36, 24 and 48 -
5. Statistics Mean
Calculate the mean of: 40, 40, 45, 35, 33, 39, 50
Answer: 40.3