Keystones — Lintel
Five GCSE retrieval questions · 12 January 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 570,000 in standard form
Answer: 5.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x - 24
Answer: (x + 12)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 26.18cm -
4. Ratio Mixed ratio problems
In ratio 9:3:7, what fraction is the first part?
Answer: 9⁄19 -
5. Statistics Mean
Calculate the mean of: 50, 28, 41, 8, 16, 39. Give your answer to 2 decimal places
Answer: 30.33