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

  1. 1. Number Adding fractions

    Calculate: 2⁄9 + 3⁄9

    Answer: 5⁄9
  2. 2. Algebra Two-step equations

    Solve: 7x - 9 = 89

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 12cm

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Divide 154 in the ratio 4:3:4

    Answer: 56, 42 and 56
  5. 5. Statistics Mean

    Find the mean of: 12, 12, 8, 17, 10

    Answer: 11.8

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