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Cornerstone · Grades 3–5 Keystones #1 30 May 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 May 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 62 + 61

    Answer: 62 + 61 = 123
  2. 2. Algebra

    Collect like terms: 2x + 3y + 7x + 7y

    Answer: 9x + 10y
  3. 3. Geometry

    Opposite = 11cm, adjacent = 9cm. Calculate the angle

    Answer: 50.7°
  4. 4. Ratio

    Simplify the ratio 28:12

    Answer: 7:3
  5. 5. Statistics

    A bag has 3 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 3⁄10

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