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Cornerstone · Grades 3–5 Keystones #1 16 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄12 + 7⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 13 = 11

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 57 in the ratio 1:2

    Answer: 19 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 24, 11, 17, 11, 14, 19

    Answer: 16

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