Keystones — Lintel
Five GCSE retrieval questions · 16 February 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.089 in standard form
Answer: 8.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 21x + 110
Answer: (x + 11)(x + 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 45°. Find opposite
Answer: 14cm -
4. Ratio Mixed ratio problems
Divide 132 in the ratio 3:1:2
Answer: 66, 22 and 44 -
5. Statistics Mean
Calculate the mean of: 36, 45, 43, 26, 33, 26. Give your answer to 2 decimal places
Answer: 34.83