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Cornerstone · Grades 3–5 Keystones #1 13 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 2⁄10

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

    Solve: 6x - 18 = 54

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 112 in the ratio 3:4

    Answer: 48 and 64
  5. 5. Statistics Mean

    Calculate the mean of: 22, 38, 50, 24, 36, 37, 36, 17

    Answer: 32.5

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