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Cornerstone · Grades 3–5 Keystones #1 7 November 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 November 2021 · mathsvault.uk/keystones

  1. 1. Number

    Multiply: 31 × 2

    Answer: 31 × 2 = 62
  2. 2. Algebra

    Solve: 2x = 12

    Answer: x = 6
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 8cm and 10cm

    Answer: 40cm²
  4. 4. Ratio

    Simplify: 24:8:24

    Answer: 3:1:3
  5. 5. Statistics

    What is the probability of rolling a 2 on a fair die?

    Answer: 1⁄6

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