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Cornerstone · Grades 3–5 Keystones #1 18 August 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 August 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 1⁄5 + 2⁄5

    Answer: 3⁄5
  2. 2. Algebra

    Solve: 6x + 10 = 5x + 13

    Answer: x = 3
  3. 3. Geometry

    Opposite = 5cm, hypotenuse = 10cm. Find the angle

    Answer: 30° (approximately)
  4. 4. Ratio

    Find 67% of 84

    Answer: 56.28
  5. 5. Statistics

    Calculate the mean of: 32, 17, 48, 25, 9, 12, 31, 5

    Answer: 22.4

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