Keystones — Lintel
Five GCSE retrieval questions · 9 September 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.004 in standard form
Answer: 4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 132
Answer: (x + 11)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 31°. Find opposite. Give your answer to 2 decimal places
Answer: 14.42cm -
4. Ratio Mixed ratio problems
In ratio 4:11:12, what fraction is the second part?
Answer: 11⁄27 -
5. Statistics Mean
Calculate the mean of: 25, 16, 9, 27, 44, 30, 17, 41. Give your answer to 2 decimal places
Answer: 26.13