Keystones — Lintel
Five GCSE retrieval questions · 14 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00082 in standard form
Answer: 8.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 30
Answer: (x + 10)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 24.77cm -
4. Ratio Mixed ratio problems
Divide 260 in the ratio 4:3:3
Answer: 104, 78 and 78 -
5. Statistics Mean
Calculate the mean of: 7, 36, 30, 40, 27, 5, 32, 13
Answer: 23.75