Keystones — Lintel
Five GCSE retrieval questions · 29 January 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.004 in standard form
Answer: 4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 36
Answer: (x - 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 10.12cm -
4. Ratio Mixed ratio problems
Black, white and yellow sweets are in the ratio 10:4:10. What fraction of the sweets are yellow?
Answer: 5⁄12 -
5. Statistics Mean
Calculate the mean of: 8, 15, 6, 38, 26, 5, 6. Give your answer to 2 decimal places
Answer: 14.86