Keystones — Lintel
Five GCSE retrieval questions · 8 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 55,000 in standard form
Answer: 5.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 29.99cm -
4. Ratio Mixed ratio problems
Divide 117 in the ratio 1:4:4
Answer: 13, 52 and 52 -
5. Statistics Mean
Calculate the mean of: 7, 36, 16, 24, 25, 43. Give your answer to 2 decimal places
Answer: 25.17