Keystones — Lintel
Five GCSE retrieval questions · 22 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
620000
Answer: 6.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 30°. Find adjacent side
Answer: 33.8cm -
4. Ratio Mixed ratio problems
Simplify: 18:18:6
Answer: 3:3:1 -
5. Statistics Mean
Calculate the mean of: 39, 15, 47, 50, 34, 5, 40
Answer: 32.9