Keystones — Lintel
Five GCSE retrieval questions · 7 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
18000000
Answer: 1.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 65°. Find adjacent side
Answer: 12.3cm -
4. Ratio Mixed ratio problems
Simplify: 24:16:16
Answer: 3:2:2 -
5. Statistics Mean
Calculate the mean of: 30, 22, 25, 8, 12, 32, 44, 29
Answer: 25.3