Keystones — Lintel
Five GCSE retrieval questions · 22 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
13000
Answer: 1.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 61°. Find adjacent side
Answer: 7.3cm -
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: 25, 6, 8, 45, 21, 42, 6, 22
Answer: 21.9