Keystones — Lintel
Five GCSE retrieval questions · 5 July 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0087
Answer: 8.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 30°. Find opposite
Answer: 10.4cm -
4. Ratio Mixed ratio problems
Simplify: 20:8:16
Answer: 5:2:4 -
5. Statistics Mean
Calculate the mean of: 33, 22, 36, 35, 42, 17, 15
Answer: 28.6