Keystones Lintel — 11 December 2018

Keystones — Lintel

Five GCSE retrieval questions · 11 December 2018 · mathsvault.uk/keystones

1. Number Converting to standard form

530000

Answer: 5.3 × 10⁵
2. Algebra Factorising monic quadratics

Factorise: x² - 10x + 24

Answer: (x - 4)(x - 6)
3. Geometry SOHCAHTOA — missing length

Hypotenuse = 20cm, angle = 37°. Find adjacent side

Answer: 16cm
4. Ratio Mixed ratio problems

Simplify: 8:20:20

Answer: 2:5:5
5. Statistics Mean

Calculate the mean of: 42, 16, 29, 35, 39, 13, 27

Answer: 28.7

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