Keystones Lintel — 22 September 2018

Keystones — Lintel

Five GCSE retrieval questions · 22 September 2018 · mathsvault.uk/keystones

1. Number Converting to standard form

270000

Answer: 2.7 × 10⁵
2. Algebra Factorising monic quadratics

Factorise: x² - 10x + 24

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

Adjacent = 12cm, angle = 43°. Find opposite

Answer: 11.2cm
4. Ratio Mixed ratio problems

Divide 150 in the ratio 1:2:2

Answer: 30, 60 and 60
5. Statistics Mean

Calculate the mean of: 48, 16, 30, 42, 25, 17

Answer: 29.7

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