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Cornerstone · Grades 3–5 Keystones #1 26 February 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 February 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 44 + 97

    Answer: 44 + 97 = 141
  2. 2. Algebra

    For y = x³ + 8, calculate y when x = 4

    Answer: y = 72
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 7cm and 6cm

    Answer: 22.2cm
  4. 4. Ratio

    Simplify: 8:8:12

    Answer: 2:2:3
  5. 5. Statistics

    A bag has 6 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 6⁄11

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