Keystones — Lintel
Five GCSE retrieval questions · 1 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0073 in standard form
Answer: 7.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 16.52cm -
4. Ratio Mixed ratio problems
£396.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £220.00 -
5. Statistics Mean
Calculate the mean of: 31, 39, 5, 45, 20, 46, 11. Give your answer to 2 decimal places
Answer: 28.14