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Cornerstone · Grades 3–5 Keystones #1 24 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 2⁄3

    Answer: 31⁄24
  2. 2. Algebra Two-step equations

    Solve: 8x - 11 = 45

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 182 in the ratio 2:1:4

    Answer: 52, 26 and 104
  5. 5. Statistics Mean

    Calculate the mean of: 41, 20, 18, 13, 14, 24, 34, 12

    Answer: 22

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