Keystones — Lintel
Five GCSE retrieval questions · 7 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 87,000,000 in standard form
Answer: 8.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 31.18cm -
4. Ratio Mixed ratio problems
Divide 176 in the ratio 3:1:4
Answer: 66, 22 and 88 -
5. Statistics Mean
Calculate the mean of: 11, 47, 12, 22, 16, 15, 5. Give your answer to 2 decimal places
Answer: 18.29