Keystones — Lintel
Five GCSE retrieval questions · 21 August 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 63,000 in standard form
Answer: 6.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 5
Answer: (x + 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 11.71cm -
4. Ratio Mixed ratio problems
Orange, purple and pink counters are in the ratio 1:6:2. What fraction of the counters are purple?
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 16, 15, 26, 42, 42, 23. Give your answer to 2 decimal places
Answer: 27.33