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Cornerstone · Grades 3–5 Keystones #1 11 March 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 March 2023 · mathsvault.uk/keystones

  1. 1. Number

    2400000

    Answer: 2.4 × 106
  2. 2. Algebra

    Simplify: 9x + 8x

    Answer: 17x
  3. 3. Geometry

    Opposite = 11cm, adjacent = 12cm. Calculate the angle

    Answer: 42.5°
  4. 4. Ratio

    Simplify the ratio 10:8

    Answer: 5:4
  5. 5. Statistics

    A bag has 3 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 3⁄7

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