Keystones — Lintel
Five GCSE retrieval questions · 25 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.088 in standard form
Answer: 8.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 56
Answer: (x + 8)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 60°. Find adjacent side
Answer: 11cm -
4. Ratio Mixed ratio problems
Orange, purple and pink counters are in the ratio 11:4:6. What fraction of the counters are orange?
Answer: 11⁄21 -
5. Statistics Mean
Calculate the mean of: 9, 49, 31, 11, 22, 40, 35. Give your answer to 2 decimal places
Answer: 28.14