Keystones — Lintel
Five GCSE retrieval questions · 10 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 46,000,000 in standard form
Answer: 4.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 30°. Find opposite. Give your answer to 2 decimal places
Answer: 6.93cm -
4. Ratio Mixed ratio problems
Simplify: 4:8:4
Answer: 1:2:1 -
5. Statistics Mean
Calculate the mean of: 39, 18, 50, 37, 22, 17, 37. Give your answer to 2 decimal places
Answer: 31.43