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Cornerstone · Grades 3–5 Keystones #1 10 May 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 May 2021 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 51 + ? = 126

    Answer: 75
  2. 2. Algebra

    Solve: 6x = 72

    Answer: x = 12
  3. 3. Geometry

    Calculate the distance between (6, 10) and (9, 14)

    Answer: 5
  4. 4. Ratio

    Simplify the ratio 6:15

    Answer: 2:5
  5. 5. Statistics

    What is the probability of rolling a 3 on a fair die?

    Answer: 1⁄6

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