Keystones — Lintel
Five GCSE retrieval questions · 9 June 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 320,000 in standard form
Answer: 3.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 45
Answer: (x + 9)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 9.44cm -
4. Ratio Mixed ratio problems
Simplify the ratio £2 : 5p
Answer: 40:1 -
5. Statistics Mean
Calculate the mean of: 22, 15, 10, 49, 27, 7. Give your answer to 2 decimal places
Answer: 21.67