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Cornerstone · Grades 3–5 Keystones #1 7 October 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 October 2022 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 53 + ? = 179

    Answer: 126
  2. 2. Algebra

    Simplify: 9x + 7x

    Answer: 16x
  3. 3. Geometry

    Opposite = 8cm, hypotenuse = 16cm. Find the angle

    Answer: 30° (approximately)
  4. 4. Ratio

    Simplify: 15:15:18

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

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

    Answer: 1⁄2

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