Keystones — Lintel
Five GCSE retrieval questions · 2 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.084
Answer: 8.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 50°. Find adjacent side
Answer: 12.2cm -
4. Ratio Mixed ratio problems
Divide 147 in the ratio 1:4:2
Answer: 21, 84 and 42 -
5. Statistics Mean
Calculate the mean of: 42, 11, 35, 34, 47, 49, 33
Answer: 35.9