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

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

  1. 1. Number Adding fractions

    Add: 2⁄7 + 3⁄4

    Answer: 29⁄28
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 36

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 5cm

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Share 28 in the ratio 3:1

    Answer: 21 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 14, 7, 50, 42, 17, 15, 40

    Answer: 26.4

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