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Cornerstone · Grades 3–5 Keystones #1 6 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 4⁄7

    Answer: 19⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 52

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 15cm

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:2:3

    Answer: 14, 28 and 42
  5. 5. Statistics Mean

    Find the mean of: 3, 10, 2, 2

    Answer: 4.25

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