Keystones — Lintel
Five GCSE retrieval questions · 2 October 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 26,000 in standard form
Answer: 2.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 28cm -
4. Ratio Mixed ratio problems
Red, blue and green beads are in the ratio 10:6:8. What fraction of the beads are red?
Answer: 5⁄12 -
5. Statistics Mean
Calculate the mean of: 13, 26, 19, 44, 24, 50, 42, 22
Answer: 30