Keystones Lintel — 6 April 2020

Keystones — Lintel

Five GCSE retrieval questions · 6 April 2020 · mathsvault.uk/keystones

1. Number Converting to standard form

51000

Answer: 5.1 × 10⁴
2. Algebra Factorising monic quadratics

Factorise: x² + x - 2

Answer: (x + 2)(x - 1)
3. Geometry SOHCAHTOA — missing length

Hypotenuse = 15cm, angle = 27°. Find adjacent side

Answer: 13.4cm
4. Ratio Mixed ratio problems

Simplify: 8:6:10

Answer: 4:3:5
5. Statistics Mean

Calculate the mean of: 23, 43, 35, 40, 47, 45, 21

Answer: 36.3

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