Keystones — Lintel
Five GCSE retrieval questions · 7 August 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000063 in standard form
Answer: 6.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 25.74cm -
4. Ratio Mixed ratio problems
Simplify the ratio £2 : 40p
Answer: 5:1 -
5. Statistics Mean
Calculate the mean of: 33, 42, 5, 9, 30, 17, 5. Give your answer to 2 decimal places
Answer: 20.14