Keystones — Lintel
Five GCSE retrieval questions · 2 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00003 in standard form
Answer: 3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x + 4
Answer: (x + 4)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 27.61cm -
4. Ratio Mixed ratio problems
£240.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £150.00 -
5. Statistics Mean
Calculate the mean of: 32, 45, 15, 20, 35, 28. Give your answer to 2 decimal places
Answer: 29.17