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Cornerstone · Grades 3–5 Keystones #1 23 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 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: 7x + 6 = 41

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 250 in the ratio 3:3:4

    Answer: 75, 75 and 100
  5. 5. Statistics Mean

    Find the mean of: 19, 19, 15

    Answer: 17.666666666667

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