Keystones — Lintel
Five GCSE retrieval questions · 16 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0029 in standard form
Answer: 2.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 13.33cm -
4. Ratio Mixed ratio problems
Simplify: 15:18:12
Answer: 5:6:4 -
5. Statistics Mean
Calculate the mean of: 44, 10, 6, 5, 7, 15, 8, 34. Give your answer to 2 decimal places
Answer: 16.13