Keystones Lintel — 24 April 2021

Keystones — Lintel

Five GCSE retrieval questions · 24 April 2021 · mathsvault.uk/keystones

1. Number Converting to standard form

67000

Answer: 6.7 × 10⁴
2. Algebra Factorising monic quadratics

Factorise: x² - 7x + 10

Answer: (x - 2)(x - 5)
3. Geometry SOHCAHTOA — missing length

Hypotenuse = 19cm, angle = 41°. Find adjacent side

Answer: 14.3cm
4. Ratio Mixed ratio problems

Simplify: 24:24:16

Answer: 3:3:2
5. Statistics Mean

Calculate the mean of: 28, 40, 40, 27, 11, 35, 16, 22

Answer: 27.4

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