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Cornerstone · Grades 3–5 Keystones #1 15 February 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 February 2022 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 84 + ? = 171

    Answer: 87
  2. 2. Algebra

    Solve: 3x = 9

    Answer: x = 3
  3. 3. Geometry

    Find the area of a circle with radius 3cm

    Answer: 28.27cm²
  4. 4. Ratio

    Calculate 25% of 120

    Answer: 30
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 1⁄2

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