Keystones — Lintel
Five GCSE retrieval questions · 16 March 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.054 in standard form
Answer: 5.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 20
Answer: (x + 2)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 10.62cm -
4. Ratio Mixed ratio problems
In ratio 10:9:6, what fraction is the second part?
Answer: 9⁄25 -
5. Statistics Mean
Calculate the mean of: 19, 47, 33, 33, 37, 12, 42, 49
Answer: 34