Keystones — Lintel
Five GCSE retrieval questions · 15 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 45,000 in standard form
Answer: 4.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 32
Answer: (x - 4)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 9.33cm -
4. Ratio Mixed ratio problems
Divide 260 in the ratio 3:4:3
Answer: 78, 104 and 78 -
5. Statistics Mean
Calculate the mean of: 9, 43, 6, 5, 29, 48, 27. Give your answer to 2 decimal places
Answer: 23.86