Keystones Lintel — 7 December 2018

Keystones — Lintel

Five GCSE retrieval questions · 7 December 2018 · mathsvault.uk/keystones

1. Number Converting to standard form

46000

Answer: 4.6 × 10⁴
2. Algebra Factorising monic quadratics

Factorise: x² - 5x + 6

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

Adjacent = 16cm, angle = 43°. Find opposite

Answer: 14.9cm
4. Ratio Mixed ratio problems

Simplify: 4:4:6

Answer: 2:2:3
5. Statistics Mean

Calculate the mean of: 13, 38, 19, 41, 47, 7

Answer: 27.5

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