Keystones — Lintel
Five GCSE retrieval questions · 5 October 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0033
Answer: 3.3 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 39°. Find adjacent side
Answer: 28cm -
4. Ratio Mixed ratio problems
Divide 240 in the ratio 2:3:3
Answer: 60, 90 and 90 -
5. Statistics Mean
Calculate the mean of: 48, 41, 27, 30, 23, 5
Answer: 29