Keystones Lintel — 13 July 2018

Keystones — Lintel

Five GCSE retrieval questions · 13 July 2018 · mathsvault.uk/keystones

1. Number Converting to standard form

84000000

Answer: 8.4 × 10⁷
2. Algebra Factorising monic quadratics

Factorise: x² + x - 6

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

Hypotenuse = 38cm, angle = 65°. Find adjacent side

Answer: 16.cm
4. Ratio Mixed ratio problems

Divide 126 in the ratio 3:1:3

Answer: 54, 18 and 54
5. Statistics Mean

Calculate the mean of: 22, 15, 23, 7, 17, 50, 11, 20

Answer: 20.6

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