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Lintel · Grades 5–7 Keystones #1 3 January 2023 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 3 January 2023 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    2400000

    Answer: 2.4 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 2x - 24

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

    Hypotenuse = 33cm, angle = 27°. Find adjacent side

    Answer: 29.4cm
  4. 4. Ratio Mixed ratio problems

    Express the first part of 2:5 as a fraction in simplest form

    Answer: 2⁄7
  5. 5. Statistics Mean

    Calculate the mean of: 23, 18, 33, 43, 23, 8

    Answer: 24.7

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