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

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

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 3⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 40

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 209 in the ratio 4:3:4

    Answer: 76, 57 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 34, 17, 32, 49, 19, 45, 44, 15

    Answer: 31.9

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