Keystones — Lintel
Five GCSE retrieval questions · 5 February 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
310000
Answer: 3.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 33°. Find adjacent side
Answer: 29.4cm -
4. Ratio Mixed ratio problems
Divide 154 in the ratio 3:3:1
Answer: 66, 66 and 22 -
5. Statistics Mean
Calculate the mean of: 26, 39, 42, 17, 16, 49, 16, 26
Answer: 28.9