Keystones Lintel — 26 October 2018

Keystones — Lintel

Five GCSE retrieval questions · 26 October 2018 · mathsvault.uk/keystones

1. Number Converting to standard form

51000

Answer: 5.1 × 10⁴
2. Algebra Factorising monic quadratics

Factorise: x² + 3x - 18

Answer: (x + 6)(x - 3)
3. Geometry SOHCAHTOA — missing length

Adjacent = 30cm, angle = 58°. Find opposite

Answer: 48cm
4. Ratio Mixed ratio problems

Simplify: 4:10:6

Answer: 2:5:3
5. Statistics Mean

Calculate the mean of: 10, 18, 50, 18, 35, 22, 6, 50

Answer: 26.1

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