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

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

  1. 1. Number Adding fractions

    Add: 1⁄6 + 1⁄4

    Answer: 5⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 13

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

    Calculate the hypotenuse when a = 11cm and b = 6cm

    Answer: 12.53cm
  4. 4. Ratio Sharing in a ratio

    Divide 136 in the ratio 1:1:2

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

    Find the mean of: 14, 17, 14

    Answer: 15

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