Keystones — Lintel
Five GCSE retrieval questions · 21 October 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 610,000 in standard form
Answer: 6.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 72
Answer: (x + 9)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 32.18cm -
4. Ratio Mixed ratio problems
Divide 104 in the ratio 1:2:1
Answer: 26, 52 and 26 -
5. Statistics Mean
Calculate the mean of: 13, 33, 28, 20, 35, 47. Give your answer to 2 decimal places
Answer: 29.33