Keystones — Lintel
Five GCSE retrieval questions · 11 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 36,000,000 in standard form
Answer: 3.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x + 10
Answer: (x + 5)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.34cm -
4. Ratio Mixed ratio problems
Red, blue and green sweets are in the ratio 6:9:12. What fraction of the sweets are red?
Answer: 2⁄9 -
5. Statistics Mean
Calculate the mean of: 22, 33, 48, 49, 14, 46. Give your answer to 2 decimal places
Answer: 35.33