Keystones — Lintel
Five GCSE retrieval questions · 12 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
370000
Answer: 3.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 64°. Find adjacent side
Answer: 13.6cm -
4. Ratio Mixed ratio problems
In ratio 3:1:4, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
Calculate the mean of: 31, 37, 38, 21, 42, 44, 45
Answer: 36.9