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Cornerstone · Grades 3–5 Keystones #1 23 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 1⁄6

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 4x + 4 = 20

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

    Calculate the hypotenuse when a = 7cm and b = 7cm

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 2:2:1

    Answer: 54, 54 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 16, 32, 10, 13, 33, 5, 22

    Answer: 18.7

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