Keystones — Lintel
Five GCSE retrieval questions · 5 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 120,000,000 in standard form
Answer: 1.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 22x + 120
Answer: (x - 10)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 38.11cm -
4. Ratio Mixed ratio problems
Orange and purple sweets are in the ratio 8:7. What fraction of the sweets are orange?
Answer: 8⁄15 -
5. Statistics Mean
Calculate the mean of: 42, 42, 19, 37, 35, 27. Give your answer to 2 decimal places
Answer: 33.67