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Cornerstone · Grades 3–5 Keystones #1 30 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x + 6 = 72

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

    Calculate the hypotenuse when a = 5cm and b = 8cm

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Divide 176 in the ratio 3:3:2

    Answer: 66, 66 and 44
  5. 5. Statistics Mean

    Find the mean of: 19, 2, 17, 7

    Answer: 11.25

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