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Cornerstone · Grades 3–5 Keystones #1 24 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄5

    Answer: 11⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x - 17 = 39

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 12cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 1:4

    Answer: 13 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 23, 44, 23, 30, 10, 12, 44, 5

    Answer: 23.9

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