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Cornerstone · Grades 3–5 Keystones #1 17 February 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 February 2025 · mathsvault.uk/keystones

  1. 1. Number

    Simplify: x8 × x7

    Answer: x15
  2. 2. Algebra

    Collect like terms: 6x + 4y + 7x + 4y

    Answer: 13x + 8y
  3. 3. Geometry

    Find the area of a circle with radius 8cm

    Answer: 201.06cm²
  4. 4. Ratio

    Simplify the ratio 8:32

    Answer: 1:4
  5. 5. Statistics

    A bag has 5 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄8

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