Keystones — Lintel
Five GCSE retrieval questions · 4 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.004 in standard form
Answer: 4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 55
Answer: (x + 11)(x + 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 16.94cm -
4. Ratio Mixed ratio problems
Simplify: 10:10:6
Answer: 5:5:3 -
5. Statistics Mean
Calculate the mean of: 23, 40, 10, 33, 24, 33, 6, 38. Give your answer to 2 decimal places
Answer: 25.88