Keystones — Lintel
Five GCSE retrieval questions · 19 March 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 1,200,000 in standard form
Answer: 1.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 11.87cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 litres : 300 ml
Answer: 10:1 -
5. Statistics Mean
Calculate the mean of: 39, 46, 6, 35, 16, 7, 9. Give your answer to 2 decimal places
Answer: 22.57