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Cornerstone · Grades 3–5 Keystones #1 26 September 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 September 2021 · mathsvault.uk/keystones

  1. 1. Number

    Add: 23.28 + 35.21

    Answer: 23.28 + 35.21 = 58.49
  2. 2. Algebra

    What is the next term? 7, 28, 112, 448, ...

    Answer: 1792
  3. 3. Geometry

    Opposite = 13cm, adjacent = 19cm. Calculate the angle

    Answer: 34.4°
  4. 4. Ratio

    Find 65% of 55

    Answer: 35.75
  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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