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Cornerstone · Grades 3–5 Keystones #1 15 February 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 15 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 1⁄8

    Answer: 55⁄56
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 64

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 2:2:1

    Answer: 24, 24 and 12
  5. 5. Statistics Mean

    Find the mean of: 5, 17, 9

    Answer: 10.333333333333

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