Keystones — Lintel
Five GCSE retrieval questions · 24 June 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
22000000
Answer: 2.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 42°. Find opposite
Answer: 17.cm -
4. Ratio Mixed ratio problems
Simplify: 6:9:6
Answer: 2:3:2 -
5. Statistics Mean
Calculate the mean of: 27, 15, 12, 10, 35, 7
Answer: 17.7