Keystones — Lintel
Five GCSE retrieval questions · 11 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0065
Answer: 6.5 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 37°. Find adjacent side
Answer: 20cm -
4. Ratio Mixed ratio problems
Simplify: 4:10:10
Answer: 2:5:5 -
5. Statistics Mean
Calculate the mean of: 38, 37, 33, 29, 25, 19
Answer: 30.2