Keystones — Lintel
Five GCSE retrieval questions · 18 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.06 in standard form
Answer: 6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 8.29cm -
4. Ratio Mixed ratio problems
Simplify: 9:12:6
Answer: 3:4:2 -
5. Statistics Mean
Calculate the mean of: 49, 44, 33, 21, 19, 32, 28, 32
Answer: 32.25