Keystones — Lintel
Five GCSE retrieval questions · 16 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0031
Answer: 3.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 56°. Find opposite
Answer: 41.5cm -
4. Ratio Mixed ratio problems
Simplify: 12:20:16
Answer: 3:5:4 -
5. Statistics Mean
Calculate the mean of: 41, 19, 6, 15, 41, 42
Answer: 27.3