Keystones — Lintel
Five GCSE retrieval questions · 27 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00033
Answer: 3.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 47°. Find opposite
Answer: 31.cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 33, 47, 20, 38, 24, 44, 50
Answer: 36.6