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

Five GCSE retrieval questions · 3 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 5⁄8

    Answer: 35⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 27

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 260 in the ratio 4:3:3

    Answer: 104, 78 and 78
  5. 5. Statistics Mean

    Find the mean of: 13, 2, 8

    Answer: 7.6666666666667

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