Keystones — Lintel
Five GCSE retrieval questions · 15 August 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.071
Answer: 7.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 29°. Find adjacent side
Answer: 17.5cm -
4. Ratio Mixed ratio problems
Divide 120 in the ratio 1:2:1
Answer: 30, 60 and 30 -
5. Statistics Mean
Calculate the mean of: 25, 42, 45, 12, 32, 48, 22
Answer: 32.3