Keystones — Lintel
Five GCSE retrieval questions · 19 February 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0083 in standard form
Answer: 8.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 18
Answer: (x + 9)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 51.96cm -
4. Ratio Mixed ratio problems
Divide 198 in the ratio 2:4:3
Answer: 44, 88 and 66 -
5. Statistics Mean
Calculate the mean of: 43, 25, 45, 36, 29, 49, 16, 27
Answer: 33.75