Keystones — Lintel
Five GCSE retrieval questions · 24 April 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0014 in standard form
Answer: 1.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places
Answer: 32.97cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 litre : 100 ml
Answer: 10:1 -
5. Statistics Mean
Calculate the mean of: 21, 46, 49, 8, 46, 45. Give your answer to 2 decimal places
Answer: 35.83