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Cornerstone · Grades 3–5 Keystones #1 20 December 2024
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 December 2024 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 565 + 381

    Answer: 565 + 381 = 946
  2. 2. Algebra

    Solve: x + 8 = 24

    Answer: x = 16
  3. 3. Geometry

    Calculate the area of a circle with diameter 21cm

    Answer: 346.36cm²
  4. 4. Ratio

    Simplify the ratio 20:30

    Answer: 2:3
  5. 5. Statistics

    A bag has 7 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 7⁄15

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