Keystones — Lintel
Five GCSE retrieval questions · 12 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00096 in standard form
Answer: 9.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 20
Answer: (x - 2)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 7cm -
4. Ratio Mixed ratio problems
Divide 99 in the ratio 2:4:3
Answer: 22, 44 and 33 -
5. Statistics Mean
Calculate the mean of: 12, 5, 31, 35, 8, 5
Answer: 16