Keystones — Lintel
Five GCSE retrieval questions · 4 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.065 in standard form
Answer: 6.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x + 7
Answer: (x + 7)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 34.95cm -
4. Ratio Mixed ratio problems
Simplify: 24:24:12
Answer: 2:2:1 -
5. Statistics Mean
Calculate the mean of: 7, 38, 11, 28, 5, 26, 33, 8
Answer: 19.5