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Cornerstone · Grades 3–5 Keystones #1 23 March 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 March 2021 · mathsvault.uk/keystones

  1. 1. Number

    450000

    Answer: 4.5 × 105
  2. 2. Algebra

    Expand: 2(x + 2)

    Answer: 2x + 4
  3. 3. Geometry

    Opposite = 13cm, hypotenuse = 18.4cm. Find the angle

    Answer: 45° (approximately)
  4. 4. Ratio

    Simplify the ratio 6:18

    Answer: 1:3
  5. 5. Statistics

    Find the mean of: 16, 12, 14, 9

    Answer: 12.75

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