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Cornerstone · Grades 3–5 Keystones #1 25 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 2⁄3

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 6 = 33

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 112 in the ratio 1:1:2

    Answer: 28, 28 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 41, 41, 34, 14, 21, 20, 26, 28

    Answer: 28.1

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