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Cornerstone · Grades 3–5 Keystones #1 20 May 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 20 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x - 14 = 28

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 92 in the ratio 1:1:2

    Answer: 23, 23 and 46
  5. 5. Statistics Mean

    Find the mean of: 19, 17, 5, 16, 7

    Answer: 12.8

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