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Cornerstone · Grades 3–5 Keystones #1 10 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄12 + 2⁄12

    Answer: 1⁄4
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 30

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 14cm

    Answer: 15.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 4:3:1

    Answer: 84, 63 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 34, 20, 44, 11, 10, 39, 21, 13

    Answer: 24

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