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Cornerstone · Grades 3–5 Keystones #1 27 June 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 June 2021 · mathsvault.uk/keystones

  1. 1. Number

    87000000

    Answer: 8.7 × 107
  2. 2. Algebra

    Solve: x + 5 = 24

    Answer: x = 19
  3. 3. Geometry

    Opposite = 11cm, hypotenuse = 15.6cm. Find the angle

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

    Simplify: 20:8:16

    Answer: 5:2:4
  5. 5. Statistics

    Find the mean of: 20, 7, 4, 4

    Answer: 8.75

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