Keystones — Lintel
Five GCSE retrieval questions · 28 October 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 450,000 in standard form
Answer: 4.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 84
Answer: (x + 7)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.11cm -
4. Ratio Mixed ratio problems
Orange, purple and pink sweets are in the ratio 5:6:2. What fraction of the sweets are pink?
Answer: 2⁄13 -
5. Statistics Mean
Calculate the mean of: 5, 48, 38, 36, 5, 8, 28
Answer: 24