Keystones — Lintel
Five GCSE retrieval questions · 15 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
490000
Answer: 4.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 41°. Find opposite
Answer: 23.5cm -
4. Ratio Mixed ratio problems
Simplify: 10:6:6
Answer: 5:3:3 -
5. Statistics Mean
Calculate the mean of: 39, 9, 27, 48, 11, 24, 45, 47
Answer: 31.3