Keystones — Lintel
Five GCSE retrieval questions · 31 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00019
Answer: 1.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 60°. Find opposite
Answer: 20.8cm -
4. Ratio Mixed ratio problems
Divide 180 in the ratio 3:1:2
Answer: 90, 30 and 60 -
5. Statistics Mean
Calculate the mean of: 32, 23, 25, 16, 42, 27, 18, 30
Answer: 26.6