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Cornerstone · Grades 3–5 Keystones #1 29 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 4⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 7 = 26

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 1:3

    Answer: 9 and 27
  5. 5. Statistics Mean

    Find the mean of: 6, 20, 10, 7, 2

    Answer: 9

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