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Cornerstone · Grades 3–5 Keystones #1 29 July 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 3⁄5

    Answer: 41⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x - 9 = 51

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Find the mean of: 6, 7, 12, 17, 18

    Answer: 12

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