Keystones — Lintel
Five GCSE retrieval questions · 30 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 700,000 in standard form
Answer: 7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 16.78cm -
4. Ratio Mixed ratio problems
£322.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £230.00 -
5. Statistics Mean
Calculate the mean of: 24, 32, 50, 32, 26, 27. Give your answer to 2 decimal places
Answer: 31.83