Keystones Lintel — 26 August 2022

Keystones — Lintel

Five GCSE retrieval questions · 26 August 2022 · mathsvault.uk/keystones

1. Number Converting to standard form

11000000

Answer: 1.1 × 10⁷
2. Algebra Factorising monic quadratics

Factorise: x² + 2x - 3

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

Hypotenuse = 30cm, angle = 37°. Find adjacent side

Answer: 24cm
4. Ratio Mixed ratio problems

Simplify: 4:6:12

Answer: 2:3:6
5. Statistics Mean

Calculate the mean of: 44, 11, 41, 48, 47, 48, 31

Answer: 38.6

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