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Cornerstone · Grades 3–5 Keystones #1 25 April 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 25 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 4⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x - 19 = -7

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Divide 162 in the ratio 2:3:1

    Answer: 54, 81 and 27
  5. 5. Statistics Mean

    Find the mean of: 20, 10, 2, 3

    Answer: 8.75

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