Keystones — Lintel
Five GCSE retrieval questions · 13 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0038 in standard form
Answer: 3.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.7cm -
4. Ratio Mixed ratio problems
Divide 96 in the ratio 4:1:1
Answer: 64, 16 and 16 -
5. Statistics Mean
Calculate the mean of: 43, 7, 39, 20, 38, 24, 35, 23. Give your answer to 2 decimal places
Answer: 28.63