Keystones — Lintel
Five GCSE retrieval questions · 21 July 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00095
Answer: 9.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 41°. Find opposite
Answer: 17.4cm -
4. Ratio Mixed ratio problems
Express the first part of 3:5 as a fraction in simplest form
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 34, 29, 48, 40, 31, 47
Answer: 38.2