Keystones — Lintel
Five GCSE retrieval questions · 19 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0023 in standard form
Answer: 2.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 25.54cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 litres : 50 ml
Answer: 60:1 -
5. Statistics Mean
Calculate the mean of: 13, 28, 9, 34, 42, 29. Give your answer to 2 decimal places
Answer: 25.83