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Cornerstone · Grades 3–5 Keystones #1 18 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

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

    Solve: 3x + 11 = 26

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 10cm

    Answer: 11.66cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 2:3

    Answer: 16 and 24
  5. 5. Statistics Mean

    Find the mean of: 6, 6, 19, 7

    Answer: 9.5

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