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Cornerstone · Grades 3–5 Keystones #1 15 December 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 15 December 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄12 + 2⁄12

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 5x + 8 = 53

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 14cm

    Answer: 14.32cm
  4. 4. Ratio Sharing in a ratio

    Divide 176 in the ratio 1:4:3

    Answer: 22, 88 and 66
  5. 5. Statistics Mean

    Find the mean of: 6, 2, 6

    Answer: 4.6666666666667

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