Keystones — Lintel
Five GCSE retrieval questions · 23 April 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0063 in standard form
Answer: 6.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 16
Answer: (x - 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 19.58cm -
4. Ratio Mixed ratio problems
In ratio 8:11:8, what fraction is the first part?
Answer: 8⁄27 -
5. Statistics Mean
Calculate the mean of: 15, 43, 39, 36, 29, 22. Give your answer to 2 decimal places
Answer: 30.67