Keystones — Lintel
Five GCSE retrieval questions · 13 March 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 960,000,000 in standard form
Answer: 9.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 19.53cm -
4. Ratio Mixed ratio problems
Divide 114 in the ratio 3:2:1
Answer: 57, 38 and 19 -
5. Statistics Mean
Calculate the mean of: 24, 45, 8, 47, 39, 40, 15. Give your answer to 2 decimal places
Answer: 31.14