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Cornerstone · Grades 3–5 Keystones #1 10 November 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 November 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 554 + 560

    Answer: 554 + 560 = 1114
  2. 2. Algebra

    Solve: x + 6 = 21

    Answer: x = 15
  3. 3. Geometry

    Opposite = 13cm, adjacent = 12cm. Calculate the angle

    Answer: 47.3°
  4. 4. Ratio

    Simplify: 8:16:20

    Answer: 2:4:5
  5. 5. Statistics

    A bag has 7 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 7⁄13

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