Keystones — Lintel
Five GCSE retrieval questions · 13 March 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00056 in standard form
Answer: 5.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x - 10
Answer: (x + 10)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 30.52cm -
4. Ratio Mixed ratio problems
Divide 55 in the ratio 3:1:1
Answer: 33, 11 and 11 -
5. Statistics Mean
Calculate the mean of: 44, 24, 27, 43, 6, 12
Answer: 26