Keystones — Lintel
Five GCSE retrieval questions · 4 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000054 in standard form
Answer: 5.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x + 5
Answer: (x + 5)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.58cm -
4. Ratio Mixed ratio problems
Divide 203 in the ratio 3:1:3
Answer: 87, 29 and 87 -
5. Statistics Mean
Calculate the mean of: 17, 42, 49, 18, 14, 50, 24. Give your answer to 2 decimal places
Answer: 30.57