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Cornerstone · Grades 3–5 Keystones #1 2 February 2024
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 February 2024 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 58 + ? = 178

    Answer: 120
  2. 2. Algebra

    Solve: 6x - 6 = 3x + 6

    Answer: x = 4
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 3cm, 4cm, 5cm

    Answer: 12cm
  4. 4. Ratio

    Calculate 10% of 192

    Answer: 19.2
  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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