Keystones — Lintel
Five GCSE retrieval questions · 27 April 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00064 in standard form
Answer: 6.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 29.26cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 litre : 600 ml
Answer: 5:3 -
5. Statistics Mean
Calculate the mean of: 44, 34, 38, 28, 18, 18, 10. Give your answer to 2 decimal places
Answer: 27.14