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Cornerstone · Grades 3–5 Keystones #294 21 October 2026 Skills week 1 of 7
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Five GCSE retrieval questions · 21 October 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 2⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 3 = 36

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 66 in the ratio 1:2

    Answer: 22 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 22, 34, 14, 31, 9, 50, 9, 14

    Answer: 22.9

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