Keystones — Lintel
Five GCSE retrieval questions · 7 July 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00062 in standard form
Answer: 6.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 28.29cm -
4. Ratio Mixed ratio problems
Simplify the ratio £5 : 70p
Answer: 50:7 -
5. Statistics Mean
Calculate the mean of: 28, 15, 10, 34, 18, 22, 46, 25
Answer: 24.75