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

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

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 2⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 7x - 19 = 51

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 250 in the ratio 4:3:3

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

    Calculate the mean of: 25, 35, 5, 30, 20, 6, 14

    Answer: 19.3

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