Keystones — Lintel
Five GCSE retrieval questions · 27 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0073 in standard form
Answer: 7.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 60
Answer: (x + 10)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 32.85cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 hours : 10 minutes
Answer: 18:1 -
5. Statistics Mean
Calculate the mean of: 14, 36, 35, 37, 47, 36. Give your answer to 2 decimal places
Answer: 34.17