Keystones — Lintel
Five GCSE retrieval questions · 8 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
390000
Answer: 3.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 60°. Find adjacent side
Answer: 19cm -
4. Ratio Mixed ratio problems
Express the first part of 6:3 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 34, 27, 48, 33, 21, 38, 28
Answer: 32.7