Keystones — Lintel
Five GCSE retrieval questions · 2 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000092 in standard form
Answer: 9.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 7cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 4:1:1
Answer: 112, 28 and 28 -
5. Statistics Mean
Calculate the mean of: 15, 45, 13, 18, 27, 10, 37. Give your answer to 2 decimal places
Answer: 23.57