Keystones — Lintel
Five GCSE retrieval questions · 28 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 340,000 in standard form
Answer: 3.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 20
Answer: (x + 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 16.31cm -
4. Ratio Mixed ratio problems
Red and blue beads are in the ratio 8:2. What fraction of the beads are blue?
Answer: 1⁄5 -
5. Statistics Mean
Calculate the mean of: 38, 46, 14, 13, 6, 10, 13
Answer: 20