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Cornerstone · Grades 3–5 Keystones #1 2 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 4⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 21

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 12cm

    Answer: 16.97cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 3:1

    Answer: 30 and 10
  5. 5. Statistics Mean

    Find the mean of: 10, 3, 5

    Answer: 6

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