Keystones — Lintel
Five GCSE retrieval questions · 9 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.026 in standard form
Answer: 2.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 16.05cm -
4. Ratio Mixed ratio problems
Orange, purple and pink beads are in the ratio 12:9:8. What fraction of the beads are orange?
Answer: 12⁄29 -
5. Statistics Mean
Calculate the mean of: 32, 40, 45, 46, 10, 46
Answer: 36.5