Keystones — Lintel
Five GCSE retrieval questions · 24 January 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
53000
Answer: 5.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 59°. Find adjacent side
Answer: 17cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 23, 21, 8, 31, 40, 25
Answer: 24.7