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Cornerstone · Grades 3–5 Keystones #1 27 January 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 January 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 5⁄6

    Answer: 31⁄30
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 25

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 5.66cm
  4. 4. Ratio Sharing in a ratio

    Divide 100 in the ratio 3:4:3

    Answer: 30, 40 and 30
  5. 5. Statistics Mean

    Find the mean of: 17, 3, 16, 15

    Answer: 12.75

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