Keystones — Lintel
Five GCSE retrieval questions · 18 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.089
Answer: 8.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 24
Answer: (x + 8)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 42°. Find opposite
Answer: 25.2cm -
4. Ratio Mixed ratio problems
Divide 91 in the ratio 2:3:2
Answer: 26, 39 and 26 -
5. Statistics Mean
Calculate the mean of: 39, 39, 10, 16, 35, 39
Answer: 29.7