Keystones — Lintel
Five GCSE retrieval questions · 13 September 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.023 in standard form
Answer: 2.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 18x + 80
Answer: (x - 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 19.43cm -
4. Ratio Mixed ratio problems
£312.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £195.00 -
5. Statistics Mean
Calculate the mean of: 19, 29, 8, 43, 13, 31. Give your answer to 2 decimal places
Answer: 23.83