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Cornerstone · Grades 3–5 Keystones #1 20 July 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 20 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 4⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 4x + 7 = 55

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 8cm

    Answer: 12.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 174 in the ratio 1:3:2

    Answer: 29, 87 and 58
  5. 5. Statistics Mean

    Find the mean of: 20, 12, 2, 10, 7

    Answer: 10.2

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