Keystones Lintel — 11 November 2021

Keystones — Lintel

Five GCSE retrieval questions · 11 November 2021 · mathsvault.uk/keystones

1. Number Converting to standard form

860000

Answer: 8.6 × 10⁵
2. Algebra Factorising monic quadratics

Factorise: x² - 5x + 6

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

Hypotenuse = 26cm, angle = 43°. Find adjacent side

Answer: 19cm
4. Ratio Mixed ratio problems

Simplify: 4:12:10

Answer: 2:6:5
5. Statistics Mean

Calculate the mean of: 28, 39, 21, 8, 39, 21

Answer: 26

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