Keystones — Lintel
Five GCSE retrieval questions · 15 April 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0084 in standard form
Answer: 8.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x + 10
Answer: (x + 5)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 14.37cm -
4. Ratio Mixed ratio problems
Orange and purple counters are in the ratio 13:6. What fraction of the counters are purple?
Answer: 6⁄19 -
5. Statistics Mean
Calculate the mean of: 8, 33, 34, 28, 41, 9, 29
Answer: 26