Keystones — Lintel
Five GCSE retrieval questions · 12 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.067
Answer: 6.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 54°. Find opposite
Answer: 20.6cm -
4. Ratio Mixed ratio problems
Express the first part of 5:2 as a fraction in simplest form
Answer: 5⁄7 -
5. Statistics Mean
Calculate the mean of: 9, 41, 18, 37, 46, 38, 48
Answer: 33.9