Keystones — Lintel
Five GCSE retrieval questions · 20 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.031
Answer: 3.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 38°. Find adjacent side
Answer: 20.5cm -
4. Ratio Mixed ratio problems
Divide 84 in the ratio 2:1:1
Answer: 42, 21 and 21 -
5. Statistics Mean
Calculate the mean of: 49, 42, 37, 31, 11, 20
Answer: 31.7