Keystones — Lintel
Five GCSE retrieval questions · 25 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
270000
Answer: 2.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 36°. Find opposite
Answer: 9.4cm -
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: 27, 17, 35, 37, 31, 8, 40, 33
Answer: 28.5