Keystones — Lintel
Five GCSE retrieval questions · 1 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0094 in standard form
Answer: 9.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 120
Answer: (x + 12)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.73cm -
4. Ratio Mixed ratio problems
Divide 50 in the ratio 1:3:1
Answer: 10, 30 and 10 -
5. Statistics Mean
Calculate the mean of: 30, 49, 16, 48, 37, 21, 31. Give your answer to 2 decimal places
Answer: 33.14