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Cornerstone · Grades 3–5 Keystones #1 8 April 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄7

    Answer: 17⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x + 5 = 26

    Answer: x = 3
  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 280 in the ratio 1:2:2

    Answer: 56, 112 and 112
  5. 5. Statistics Mean

    Find the mean of: 17, 7, 14

    Answer: 12.666666666667

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