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Cornerstone · Grades 3–5 Keystones #1 28 January 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 January 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 1⁄4

    Answer: 11⁄28
  2. 2. Algebra Two-step equations

    Solve: 3x + 7 = 37

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

    Calculate the hypotenuse when a = 4cm and b = 6cm

    Answer: 7.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 1:2:3

    Answer: 21, 42 and 63
  5. 5. Statistics Mean

    Find the mean of: 10, 4, 18, 2, 4

    Answer: 7.6

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