Keystones — Lintel
Five GCSE retrieval questions · 9 April 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000053 in standard form
Answer: 5.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 litre : 200 ml
Answer: 5:1 -
5. Statistics Mean
Calculate the mean of: 38, 14, 46, 16, 18, 15
Answer: 24.5