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

Five GCSE retrieval questions · 5 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 54

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 130 in the ratio 2:1:2

    Answer: 52, 26 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 38, 21, 41, 6, 30, 27

    Answer: 27.2

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