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Cornerstone · Grades 3–5 Keystones #1 31 July 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 31 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄12 + 2⁄12

    Answer: 5⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 40

    Answer: x = 6
  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 84 in the ratio 2:1

    Answer: 56 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 8, 47, 40, 11, 8, 18, 34, 36

    Answer: 25.3

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