Keystones — Lintel
Five GCSE retrieval questions · 13 November 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 700,000 in standard form
Answer: 7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 22.52cm -
4. Ratio Mixed ratio problems
Red and blue beads are in the ratio 12:3. What fraction of the beads are red?
Answer: 4⁄5 -
5. Statistics Mean
Calculate the mean of: 10, 45, 32, 7, 38, 19. Give your answer to 2 decimal places
Answer: 25.17