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Cornerstone · Grades 3–5 Keystones #1 19 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄6

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

    Solve: 3x - 9 = 24

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

    Calculate the hypotenuse when a = 6cm and b = 7cm

    Answer: 9.22cm
  4. 4. Ratio Sharing in a ratio

    Divide 300 in the ratio 1:2:2

    Answer: 60, 120 and 120
  5. 5. Statistics Mean

    Calculate the mean of: 23, 44, 6, 22, 6, 30, 9, 23

    Answer: 20.4

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