Keystones — Lintel
Five GCSE retrieval questions · 8 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0084
Answer: 8.4 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 64°. Find adjacent side
Answer: 14.5cm -
4. Ratio Mixed ratio problems
Divide 196 in the ratio 4:2:1
Answer: 112, 56 and 28 -
5. Statistics Mean
Calculate the mean of: 5, 49, 44, 47, 22, 46, 27, 17
Answer: 32.1