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Cornerstone · Grades 3–5 Keystones #1 21 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 3⁄5

    Answer: 11⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 30

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

    Calculate the hypotenuse when a = 11cm and b = 7cm

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 1:4:3

    Answer: 10, 40 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 34, 36, 50, 13, 50, 43, 6

    Answer: 33.1

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