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Cornerstone · Grades 3–5 Keystones #1 27 February 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 27 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄8

    Answer: 11⁄24
  2. 2. Algebra Two-step equations

    Solve: 5x + 3 = 28

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 2:1

    Answer: 32 and 16
  5. 5. Statistics Mean

    Find the mean of: 7, 13, 20, 17, 15

    Answer: 14.4

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