Keystones — Lintel
Five GCSE retrieval questions · 20 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 440,000 in standard form
Answer: 4.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.35cm -
4. Ratio Mixed ratio problems
Red, blue and green beads are in the ratio 8:4:7. What fraction of the beads are blue?
Answer: 4⁄19 -
5. Statistics Mean
Calculate the mean of: 9, 16, 35, 42, 21, 31, 35
Answer: 27