Keystones — Lintel
Five GCSE retrieval questions · 17 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0069
Answer: 6.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 44°. Find adjacent side
Answer: 20.cm -
4. Ratio Mixed ratio problems
Simplify: 10:12:8
Answer: 5:6:4 -
5. Statistics Mean
Calculate the mean of: 42, 39, 42, 47, 17, 46
Answer: 38.8