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Cornerstone · Grades 3–5 Keystones #1 8 August 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 8 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 34

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

    Calculate the hypotenuse when a = 9cm and b = 9cm

    Answer: 12.73cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Find the mean of: 16, 3, 9, 3, 12

    Answer: 8.6

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