Keystones — Lintel
Five GCSE retrieval questions · 27 July 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00064 in standard form
Answer: 6.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 27
Answer: (x + 3)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.9cm -
4. Ratio Mixed ratio problems
Divide 120 in the ratio 3:3:2
Answer: 45, 45 and 30 -
5. Statistics Mean
Calculate the mean of: 45, 30, 42, 45, 42, 27
Answer: 38.5