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

  1. 1. Number Adding fractions

    Calculate: 1⁄12 + 6⁄12

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 8x - 17 = 23

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 4:1:1

    Answer: 112, 28 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 50, 10, 21, 9, 6, 34, 31

    Answer: 23

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