Keystones — Lintel
Five GCSE retrieval questions · 22 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 29,000 in standard form
Answer: 2.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 27.01cm -
4. Ratio Mixed ratio problems
Red and blue beads are in the ratio 2:9. What fraction of the beads are red?
Answer: 2⁄11 -
5. Statistics Mean
Calculate the mean of: 30, 34, 33, 7, 49, 26. Give your answer to 2 decimal places
Answer: 29.83