Keystones — Lintel
Five GCSE retrieval questions · 27 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00035 in standard form
Answer: 3.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 17.19cm -
4. Ratio Mixed ratio problems
Divide 80 in the ratio 1:3:1
Answer: 16, 48 and 16 -
5. Statistics Mean
Calculate the mean of: 11, 36, 23, 31, 40, 31, 37, 33
Answer: 30.25