Keystones — Lintel
Five GCSE retrieval questions · 25 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 350,000,000 in standard form
Answer: 3.5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 18x + 81
Answer: (x + 9)(x + 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 22.02cm -
4. Ratio Mixed ratio problems
£175.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
Calculate the mean of: 47, 35, 35, 25, 35, 30
Answer: 34.5