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Cornerstone · Grades 3–5 Keystones #1 19 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

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

    Solve: 2x + 11 = 17

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 112 in the ratio 3:4:1

    Answer: 42, 56 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 8, 30, 34, 7, 34, 48, 10, 22

    Answer: 24.1

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