Keystones — Lintel
Five GCSE retrieval questions · 9 October 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00097 in standard form
Answer: 9.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 21
Answer: (x + 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 26.15cm -
4. Ratio Mixed ratio problems
£329.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £94.00 -
5. Statistics Mean
Calculate the mean of: 18, 30, 43, 18, 10, 38, 26, 28. Give your answer to 2 decimal places
Answer: 26.38