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Cornerstone · Grades 3–5 Keystones #1 15 October 2024
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 October 2024 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 79 + ? = 120

    Answer: 41
  2. 2. Algebra

    Solve: 8x = 72

    Answer: x = 9
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio

    Simplify the ratio 40:25

    Answer: 8:5
  5. 5. Statistics

    What is the probability of rolling a 5 on a fair die?

    Answer: 1⁄6

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