Keystones — Lintel
Five GCSE retrieval questions · 29 September 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 48,000 in standard form
Answer: 4.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 48
Answer: (x + 6)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.92cm -
4. Ratio Mixed ratio problems
Red and blue sweets are in the ratio 12:11. What fraction of the sweets are blue?
Answer: 11⁄23 -
5. Statistics Mean
Calculate the mean of: 36, 11, 33, 34, 11, 25, 38, 39. Give your answer to 2 decimal places
Answer: 28.38