Keystones — Lintel
Five GCSE retrieval questions · 19 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
950000
Answer: 9.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 31°. Find opposite
Answer: 18cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 29, 45, 26, 42, 27, 24
Answer: 32.2