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Cornerstone · Grades 3–5 Keystones #1 12 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 3⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x - 17 = 13

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 6cm

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 153 in the ratio 4:2:3

    Answer: 68, 34 and 51
  5. 5. Statistics Mean

    Find the mean of: 15, 6, 12, 13, 7

    Answer: 10.6

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