Keystones — Lintel
Five GCSE retrieval questions · 5 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0091
Answer: 9.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 57°. Find adjacent side
Answer: 16.9cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 3:1:4
Answer: 63, 21 and 84 -
5. Statistics Mean
Calculate the mean of: 29, 27, 44, 42, 5, 22, 45, 13
Answer: 28.4