Keystones — Lintel
Five GCSE retrieval questions · 3 January 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.034
Answer: 3.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 53°. Find adjacent side
Answer: 20.5cm -
4. Ratio Mixed ratio problems
Divide 189 in the ratio 2:3:2
Answer: 54, 81 and 54 -
5. Statistics Mean
Calculate the mean of: 43, 11, 22, 34, 43, 35, 13
Answer: 28.7