Keystones — Lintel
Five GCSE retrieval questions · 24 July 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0021
Answer: 2.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 64°. Find adjacent side
Answer: 12.7cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:24
Answer: 1:1:3 -
5. Statistics Mean
Calculate the mean of: 46, 40, 47, 19, 15, 38, 48, 33
Answer: 35.8