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Cornerstone · Grades 3–5 Keystones #1 23 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 5⁄6

    Answer: 19⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 14 = 63

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

    Calculate the hypotenuse when a = 7cm and b = 7cm

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Divide 95 in the ratio 1:3:1

    Answer: 19, 57 and 19
  5. 5. Statistics Mean

    Find the mean of: 3, 20, 13, 8, 7

    Answer: 10.2

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