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Cornerstone · Grades 3–5 Keystones #1 8 February 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 8 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 11 = 59

    Answer: x = 12
  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

    Share 42 in the ratio 2:1

    Answer: 28 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 33, 18, 23, 21, 18, 15, 21, 22

    Answer: 21.4

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