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Cornerstone · Grades 3–5 Keystones #1 29 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄9 + 1⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 64

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 12cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 1:2:1

    Answer: 40, 80 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 13, 38, 35, 38, 10, 38, 30, 30

    Answer: 29

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