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Cornerstone · Grades 3–5 Keystones #1 18 July 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 18 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x - 14 = 36

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

    Calculate the hypotenuse when a = 5cm and b = 4cm

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 220 in the ratio 1:2:2

    Answer: 44, 88 and 88
  5. 5. Statistics Mean

    Find the mean of: 9, 2, 3, 13

    Answer: 6.75

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