Keystones — Lintel
Five GCSE retrieval questions · 15 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0069
Answer: 6.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 55°. Find opposite
Answer: 14.3cm -
4. Ratio Mixed ratio problems
Divide 144 in the ratio 3:2:4
Answer: 48, 32 and 64 -
5. Statistics Mean
Calculate the mean of: 37, 34, 43, 35, 42, 24, 11
Answer: 32.3