Keystones — Lintel
Five GCSE retrieval questions · 6 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0065
Answer: 6.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 18
Answer: (x + 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 37°. Find adjacent side
Answer: 31.9cm -
4. Ratio Mixed ratio problems
Express the first part of 4:3 as a fraction in simplest form
Answer: 4⁄7 -
5. Statistics Mean
Calculate the mean of: 31, 48, 33, 13, 25, 43, 19
Answer: 30.3