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Cornerstone · Grades 3–5 Keystones #1 20 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄8 + 4⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 3x - 10 = 23

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

    Calculate the hypotenuse when a = 9cm and b = 11cm

    Answer: 14.21cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 4:1

    Answer: 20 and 5
  5. 5. Statistics Mean

    Find the mean of: 18, 12, 20, 7, 18

    Answer: 15

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