Keystones — Lintel
Five GCSE retrieval questions · 8 January 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0043 in standard form
Answer: 4.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.65cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m : 80cm
Answer: 35:4 -
5. Statistics Mean
Calculate the mean of: 18, 49, 22, 9, 26, 41
Answer: 27.5