Keystones — Lintel
Five GCSE retrieval questions · 2 February 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0062
Answer: 6.2 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 48°. Find opposite
Answer: 16.7cm -
4. Ratio Mixed ratio problems
Divide 232 in the ratio 2:1:1
Answer: 116, 58 and 58 -
5. Statistics Mean
Calculate the mean of: 23, 26, 11, 41, 6, 30
Answer: 22.8