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Cornerstone · Grades 3–5 Keystones #1 13 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 4⁄5

    Answer: 22⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 85

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 15cm

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 4:1

    Answer: 80 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 12, 23, 11, 35, 49, 8, 39

    Answer: 25.3

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