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Cornerstone · Grades 3–5 Keystones #1 14 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄9 + 2⁄9

    Answer: 4⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x - 13 = 17

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 13cm

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 3:3:2

    Answer: 45, 45 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 16, 38, 32, 45, 48, 25, 26

    Answer: 32.9

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