Keystones — Lintel
Five GCSE retrieval questions · 24 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.079 in standard form
Answer: 7.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.98cm -
4. Ratio Mixed ratio problems
Divide 180 in the ratio 4:4:1
Answer: 80, 80 and 20 -
5. Statistics Mean
Calculate the mean of: 49, 36, 42, 48, 36, 12, 35. Give your answer to 2 decimal places
Answer: 36.86