Keystones — Lintel
Five GCSE retrieval questions · 7 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00065
Answer: 6.5 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 47°. Find adjacent side
Answer: 10.9cm -
4. Ratio Mixed ratio problems
Divide 174 in the ratio 1:2:3
Answer: 29, 58 and 87 -
5. Statistics Mean
Calculate the mean of: 9, 5, 32, 21, 38, 6, 34
Answer: 20.7