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

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

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

    Solve: 2x + 12 = 34

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

    Calculate the hypotenuse when a = 10cm and b = 14cm

    Answer: 17.2cm
  4. 4. Ratio Sharing in a ratio

    Share 105 in the ratio 4:3

    Answer: 60 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 13, 6, 38, 39, 16, 20

    Answer: 22

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