Keystones — Lintel
Five GCSE retrieval questions · 14 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00092 in standard form
Answer: 9.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.85cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m : 30cm
Answer: 20:1 -
5. Statistics Mean
Calculate the mean of: 24, 39, 9, 42, 6, 18
Answer: 23