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

Five GCSE retrieval questions · 1 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄6

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

    Solve: 5x - 5 = 70

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 10cm

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 4:1:1

    Answer: 60, 15 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 33, 46, 14, 45, 39, 20, 21, 27

    Answer: 30.6

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