Keystones — Lintel
Five GCSE retrieval questions · 8 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.037
Answer: 3.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 53°. Find adjacent side
Answer: 12cm -
4. Ratio Mixed ratio problems
Express the first part of 2:3 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 28, 33, 41, 33, 16, 14
Answer: 27.5