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Cornerstone · Grades 3–5 Keystones #1 28 December 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 28 December 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 1⁄6

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

    Solve: 6x + 6 = 30

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 9cm

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 3:1

    Answer: 36 and 12
  5. 5. Statistics Mean

    Find the mean of: 15, 13, 16

    Answer: 14.666666666667

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