Keystones — Lintel
Five GCSE retrieval questions · 2 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 300,000 in standard form
Answer: 3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 22.4cm -
4. Ratio Mixed ratio problems
Orange and purple sweets are in the ratio 6:7. What fraction of the sweets are purple?
Answer: 7⁄13 -
5. Statistics Mean
Calculate the mean of: 44, 9, 20, 38, 33, 26, 8. Give your answer to 2 decimal places
Answer: 25.43