Keystones — Lintel
Five GCSE retrieval questions · 27 June 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00072
Answer: 7.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 46°. Find adjacent side
Answer: 24.3cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 2:3:1
Answer: 56, 84 and 28 -
5. Statistics Mean
Calculate the mean of: 19, 12, 38, 28, 9, 11, 27, 49
Answer: 24.1