Keystones — Lintel
Five GCSE retrieval questions · 9 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
11000000
Answer: 1.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 31°. Find adjacent side
Answer: 28.3cm -
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: 30, 41, 23, 28, 26, 26
Answer: 29