Keystones — Lintel
Five GCSE retrieval questions · 29 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0047
Answer: 4.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 30°. Find adjacent side
Answer: 27.7cm -
4. Ratio Mixed ratio problems
Simplify: 4:8:6
Answer: 2:4:3 -
5. Statistics Mean
Calculate the mean of: 15, 19, 43, 18, 10, 48, 39, 10
Answer: 25.3