Keystones — Lintel
Five GCSE retrieval questions · 21 July 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00009 in standard form
Answer: 9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x + 5
Answer: (x + 5)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 30°. Find opposite. Give your answer to 2 decimal places
Answer: 13.28cm -
4. Ratio Mixed ratio problems
£392.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £245.00 -
5. Statistics Mean
Calculate the mean of: 25, 47, 41, 28, 39, 50, 6. Give your answer to 2 decimal places
Answer: 33.71