Keystones — Lintel
Five GCSE retrieval questions · 26 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
3800000
Answer: 3.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 48°. Find opposite
Answer: 18.9cm -
4. Ratio Mixed ratio problems
Divide 90 in the ratio 3:4:2
Answer: 30, 40 and 20 -
5. Statistics Mean
Calculate the mean of: 30, 21, 7, 15, 24, 22, 18
Answer: 19.6