Keystones — Lintel
Five GCSE retrieval questions · 1 January 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0017 in standard form
Answer: 1.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 10.16cm -
4. Ratio Mixed ratio problems
Divide 175 in the ratio 2:2:3
Answer: 50, 50 and 75 -
5. Statistics Mean
Calculate the mean of: 36, 25, 33, 48, 22, 17. Give your answer to 2 decimal places
Answer: 30.17