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Cornerstone · Grades 3–5 Keystones #1 20 April 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 20 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 1⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 19

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 1:4

    Answer: 18 and 72
  5. 5. Statistics Mean

    Find the mean of: 2, 14, 8

    Answer: 8

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