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Cornerstone · Grades 3–5 Keystones #1 13 March 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 13 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 7⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 5 = 40

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 10cm

    Answer: 12.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 189 in the ratio 2:3:2

    Answer: 54, 81 and 54
  5. 5. Statistics Mean

    Find the mean of: 16, 2, 20, 18

    Answer: 14

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