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Cornerstone · Grades 3–5 Keystones #1 14 August 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 14 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 1⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 6x - 5 = 43

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 2:4:1

    Answer: 48, 96 and 24
  5. 5. Statistics Mean

    Find the mean of: 2, 9, 19, 9

    Answer: 9.75

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