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Cornerstone · Grades 3–5 Keystones #1 19 July 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄8

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 4x + 11 = 35

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 187 in the ratio 3:4:4

    Answer: 51, 68 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 45, 47, 5, 17, 47, 23, 41

    Answer: 32.1

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