Keystones Lintel — 27 December 2022

Keystones — Lintel

Five GCSE retrieval questions · 27 December 2022 · mathsvault.uk/keystones

1. Number Converting to standard form

11000000

Answer: 1.1 × 10⁷
2. Algebra Factorising monic quadratics

Factorise: x² - 12x + 36

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

Adjacent = 26cm, angle = 31°. Find opposite

Answer: 15.6cm
4. Ratio Mixed ratio problems

Simplify: 20:20:16

Answer: 5:5:4
5. Statistics Mean

Calculate the mean of: 48, 45, 9, 20, 26, 36, 43, 24

Answer: 31.4

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