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Cornerstone · Grades 3–5 Keystones #32 17 July 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 July 2026 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 56 + ? = 190

    Answer: 134
  2. 2. Algebra

    Solve: 5x = 25

    Answer: x = 5
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 8.5cm. Find the angle

    Answer: 45° (approximately)
  4. 4. Ratio

    Simplify: 4:10:4

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

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

    Answer: 1⁄2

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