Keystones — Lintel
Five GCSE retrieval questions · 10 August 2019 · 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 + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 50°. Find opposite
Answer: 20.3cm -
4. Ratio Mixed ratio problems
Simplify: 20:8:8
Answer: 5:2:2 -
5. Statistics Mean
Calculate the mean of: 49, 35, 49, 48, 48, 48
Answer: 46.2