Keystones — Lintel
Five GCSE retrieval questions · 21 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
320000
Answer: 3.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 48°. Find opposite
Answer: 33.3cm -
4. Ratio Mixed ratio problems
Divide 90 in the ratio 1:2:3
Answer: 15, 30 and 45 -
5. Statistics Mean
Calculate the mean of: 13, 41, 30, 22, 35, 28, 42
Answer: 30.1