Keystones — Lintel
Five GCSE retrieval questions · 18 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.093
Answer: 9.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 31°. Find adjacent side
Answer: 34.3cm -
4. Ratio Mixed ratio problems
Express the first part of 4:6 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 9, 18, 28, 37, 34, 41
Answer: 27.8