Keystones — Lintel
Five GCSE retrieval questions · 4 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00066
Answer: 6.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 42°. Find opposite
Answer: 14.4cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 20, 12, 10, 7, 19, 18
Answer: 14.3