Keystones Lintel — 8 December 2018

Keystones — Lintel

Five GCSE retrieval questions · 8 December 2018 · mathsvault.uk/keystones

1. Number Converting to standard form

65000

Answer: 6.5 × 10⁴
2. Algebra Factorising monic quadratics

Factorise: x² - 7x + 10

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

Adjacent = 28cm, angle = 46°. Find opposite

Answer: 29cm
4. Ratio Mixed ratio problems

Divide 230 in the ratio 1:2:2

Answer: 46, 92 and 92
5. Statistics Mean

Calculate the mean of: 21, 21, 22, 14, 29, 39, 5

Answer: 21.6

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