Keystones — Lintel
Five GCSE retrieval questions · 3 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0049
Answer: 4.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 41°. Find adjacent side
Answer: 12.8cm -
4. Ratio Mixed ratio problems
In ratio 1:4:4, what fraction is the second part?
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 36, 44, 33, 34, 38, 45
Answer: 38.3