Keystones — Lintel
Five GCSE retrieval questions · 25 September 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 490,000 in standard form
Answer: 4.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 20
Answer: (x + 10)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 45.03cm -
4. Ratio Mixed ratio problems
Red and blue beads are in the ratio 10:2. What fraction of the beads are blue?
Answer: 1⁄6 -
5. Statistics Mean
Calculate the mean of: 50, 35, 17, 45, 46, 7, 42, 7. Give your answer to 2 decimal places
Answer: 31.13