Keystones — Lintel
Five GCSE retrieval questions · 25 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 13,000 in standard form
Answer: 1.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x - 12
Answer: (x + 12)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 11.69cm -
4. Ratio Mixed ratio problems
Orange, purple and pink marbles are in the ratio 1:6:7. What fraction of the marbles are orange?
Answer: 1⁄14 -
5. Statistics Mean
Calculate the mean of: 39, 44, 24, 9, 27, 25
Answer: 28