Keystones — Lintel
Five GCSE retrieval questions · 13 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 83,000 in standard form
Answer: 8.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 25.11cm -
4. Ratio Mixed ratio problems
Orange and purple beads are in the ratio 10:5. What fraction of the beads are purple?
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 48, 38, 47, 9, 36, 5, 30. Give your answer to 2 decimal places
Answer: 30.43