Keystones — Lintel
Five GCSE retrieval questions · 2 February 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,500,000 in standard form
Answer: 5.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 13.51cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m : 35cm
Answer: 20:1 -
5. Statistics Mean
Calculate the mean of: 30, 40, 7, 15, 45, 38, 24, 30. Give your answer to 2 decimal places
Answer: 28.63