Keystones — Lintel
Five GCSE retrieval questions · 4 September 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 110,000 in standard form
Answer: 1.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 132
Answer: (x + 12)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.84cm -
4. Ratio Mixed ratio problems
Black and white counters are in the ratio 13:11. What fraction of the counters are black?
Answer: 13⁄24 -
5. Statistics Mean
Calculate the mean of: 14, 34, 12, 37, 10, 19
Answer: 21