Keystones — Lintel
Five GCSE retrieval questions · 27 December 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0026 in standard form
Answer: 2.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 9.23cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 litres : 150 ml
Answer: 40:3 -
5. Statistics Mean
Calculate the mean of: 8, 18, 39, 48, 35, 23, 35. Give your answer to 2 decimal places
Answer: 29.43