Keystones — Lintel
Five GCSE retrieval questions · 23 October 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 290,000 in standard form
Answer: 2.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.47cm -
4. Ratio Mixed ratio problems
Black, white and yellow beads are in the ratio 2:9:5. What fraction of the beads are black?
Answer: 1⁄8 -
5. Statistics Mean
Calculate the mean of: 27, 35, 36, 49, 46, 44, 14, 38. Give your answer to 2 decimal places
Answer: 36.13