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Cornerstone · Grades 3–5 Keystones #1 16 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

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

    Solve: 4x + 7 = 55

    Answer: x = 12
  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

    Divide 119 in the ratio 1:4:2

    Answer: 17, 68 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 37, 25, 22, 44, 43, 19, 13, 35

    Answer: 29.8

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