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Cornerstone · Grades 3–5 Keystones #87 28 March 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 March 2026 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 94 + 48

    Answer: 94 + 48 = 142
  2. 2. Algebra

    Collect like terms: 5x + 7y + 3x + 4y

    Answer: 8x + 11y
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 10cm

    Answer: 14.14cm
  4. 4. Ratio

    Find 35% of 485

    Answer: 169.75
  5. 5. Statistics

    A bag has 3 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄3

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