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Cornerstone · Grades 3–5 Keystones #1 8 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 2⁄8

    Answer: 17⁄20
  2. 2. Algebra Two-step equations

    Solve: 8x - 17 = 23

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 1:4

    Answer: 20 and 80
  5. 5. Statistics Mean

    Find the mean of: 12, 2, 15, 8

    Answer: 9.25

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