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Cornerstone · Grades 3–5 Keystones #1 17 November 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 November 2022 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 81 + 86

    Answer: 81 + 86 = 167
  2. 2. Algebra

    Solve: x + 8 = 19

    Answer: x = 11
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 17.3cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Simplify: 12:10:8

    Answer: 6:5:4
  5. 5. Statistics

    A bag has 7 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 7⁄11

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