Keystones — Lintel
Five GCSE retrieval questions · 19 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 86,000 in standard form
Answer: 8.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 3
Answer: (x + 1)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 29.19cm -
4. Ratio Mixed ratio problems
Red and blue beads are in the ratio 10:7. What fraction of the beads are red?
Answer: 10⁄17 -
5. Statistics Mean
Calculate the mean of: 10, 29, 12, 45, 11, 24, 37, 35. Give your answer to 2 decimal places
Answer: 25.38