Keystones — Lintel
Five GCSE retrieval questions · 1 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0071
Answer: 7.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 48°. Find opposite
Answer: 28.9cm -
4. Ratio Mixed ratio problems
Divide 85 in the ratio 2:2:1
Answer: 34, 34 and 17 -
5. Statistics Mean
Calculate the mean of: 27, 45, 26, 12, 42, 23, 39, 49
Answer: 32.9