Keystones — Lintel
Five GCSE retrieval questions · 12 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.002 in standard form
Answer: 2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 20
Answer: (x + 2)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.31cm -
4. Ratio Mixed ratio problems
Red and blue beads are in the ratio 5:6. What fraction of the beads are red?
Answer: 5⁄11 -
5. Statistics Mean
Calculate the mean of: 9, 5, 42, 24, 27, 11, 38. Give your answer to 2 decimal places
Answer: 22.29