Keystones — Lintel
Five GCSE retrieval questions · 25 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.034
Answer: 3.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 63°. Find adjacent side
Answer: 6.8cm -
4. Ratio Mixed ratio problems
Express the first part of 3:4 as a fraction in simplest form
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 34, 35, 27, 12, 32, 21
Answer: 26.8