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Cornerstone · Grades 3–5 Keystones #1 12 October 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 October 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄10 + 3⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 2x - 11 = 13

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

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 1:3

    Answer: 10 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 37, 37, 37, 44, 24, 24

    Answer: 33.8

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