Keystones — Lintel
Five GCSE retrieval questions · 12 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,900,000 in standard form
Answer: 6.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 19.61cm -
4. Ratio Mixed ratio problems
Simplify the ratio 9m : 75cm
Answer: 12:1 -
5. Statistics Mean
Calculate the mean of: 39, 15, 32, 18, 11, 10, 27. Give your answer to 2 decimal places
Answer: 21.71