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Cornerstone · Grades 3–5 Keystones #1 29 June 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 29 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 5⁄7

    Answer: 53⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x + 12 = 45

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 3:2:4

    Answer: 48, 32 and 64
  5. 5. Statistics Mean

    Find the mean of: 20, 13, 5, 19

    Answer: 14.25

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