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Cornerstone · Grades 3–5 Keystones #1 24 September 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 24 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 1⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 4x - 12 = 16

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 152 in the ratio 1:3:4

    Answer: 19, 57 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 32, 48, 16, 47, 44, 24

    Answer: 35.2

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