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

Five GCSE retrieval questions · 5 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 5⁄12

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 8x - 8 = 88

    Answer: x = 12
  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 85 in the ratio 4:1

    Answer: 68 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 44, 35, 42, 34, 25, 35

    Answer: 35.8

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