Keystones — Lintel
Five GCSE retrieval questions · 29 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.087
Answer: 8.7 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 31°. Find opposite
Answer: 13.8cm -
4. Ratio Mixed ratio problems
Express the first part of 2:5 as a fraction in simplest form
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 46, 24, 14, 27, 47, 39, 32, 17
Answer: 30.8