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Cornerstone · Grades 3–5 Keystones #1 11 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 2⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x + 11 = 65

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 21 in the ratio 2:1

    Answer: 14 and 7
  5. 5. Statistics Mean

    Find the mean of: 9, 5, 3, 4, 10

    Answer: 6.2

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