Keystones — Lintel
Five GCSE retrieval questions · 7 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0008 in standard form
Answer: 8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 54
Answer: (x + 9)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 8.39cm -
4. Ratio Mixed ratio problems
£235.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £141.00 -
5. Statistics Mean
Calculate the mean of: 7, 26, 20, 7, 24, 40. Give your answer to 2 decimal places
Answer: 20.67