Keystones — Lintel
Five GCSE retrieval questions · 28 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
330000
Answer: 3.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 56°. Find adjacent side
Answer: 9.5cm -
4. Ratio Mixed ratio problems
Express the first part of 4:2 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 20, 40, 20, 14, 18, 42
Answer: 25.7